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Another Dimension

"Listen: there's a hell of a good universe next door; let's go."

A very, very old trope, still used today. Another Dimension refers to universes that are "next" to our own, which require magic or high-end technology to travel to and from. In theory, from our world they are in a direction other than the directions we are familiar with.

This term is actually used wrong (and let's not talk about "parallel dimensions", which is a contradiction in its own right). What we usually know as another dimension could be called a "parallel space" in a fourth (or other-th) dimension: that fourth dimension would be the set of all existing alternate spaces.

Alternate universes are often just a variety of Another Dimension. Unlike AUs, though, other dimensions don't necessarily have to resemble the "home" universe. There may be a Void Between the Worlds to go through.

Travel to and from another dimension is usually via some sort of door, vortex, portal, gate, window — the exact term depends on the story. Sometimes some kind of teleportation suffices. Characters might need the aid of Weirdness Search and Rescue to get home. Entering the dimension can sometimes be used as an Extradimensional Shortcut.

Despite 'dimension' being a relatively new term for it, the concept is Older Than Dirt. The "fairy lands" of Celtic Mythology and European fairy tales, the various universes of Hindu cosmology, Hell, Heaven and The Underworld, and so on.

Types of Other Dimensions:


Examples:

    open/close all folders 

    Anime & Manga 
  • The Digital World in Digimon, as described by the human protagonists.
  • The Otherworld in Yozakura Quartet
  • Muge Space in Dancougar. It is also seen in Super Robot Wars Compact, Super Robot Wars Compact 2, Super Robot Wars Alpha 3 and Super Robot Wars GC
  • This is where the aliens in Bokurano come from. They're actually humans from alternate timelines, but that revelation comes later.
  • In Saint Seiya, these are weaponized, used by Gemini Saga and Kanon as a way of removing opponents from the battlefield without much difficulty. Phoenix Ikki also uses one at one point in an attempt to defeat Virgo Shaka by sending both he and Shaka there. In Saint Seiya: The Lost Canvas, Saga and Kanon's predecessors display similar aptitude in the art and actually uses it at one point to rob a Physical God of the capacity to control time by simply transporting both of them to a dimension where time doesn't exist.
  • The page image is from successor series Saint Seiya Omega. The Gold Saint Gemini Paradox can use the attack "Crossroads Mirage" to put the target outside of time and space so she can show them the effects of the choices they have before them. She uses it to try to force Ryuho to decide between betraying his friends or dying through fighting her. The sadistic part comes in that she shows him a utopic future if he betrays them, and thousands dead if he resists. To add extra danger, it is an actual attack, and it puts the victim body and mind between the two choices and will destroy them via psychic pressure unless they decide.
  • Popotan: Where Shizuku dwells.

    Comic Books 

    Fan Works 
  • The Dark Gods' realm, and the Dark Kingdom in Dungeon Keeper Ami. Both are alternate dimensions of the Dungeon Keeper and Sailor Moon dimensions, respectively, themselves in-universe alternate dimensions.
  • The Midnight Cage from Hottie 3: The Best Fan Fic in the World.
  • C'hou in With Strings Attached is explicitly set in another dimension; the other planets that the four visit are also in other dimensions. In fact, “universe” and “dimension” are synonymous in this work.
  • Termina in The Blue Blur of Termina is this to Sonic's Earth, accessible only via a portal deep within the jungles of Adabat.
  • The Realm of the Gods in The Three Kings: Hunt which was inhabited by the Gods and was invaded by the wizards.
  • An Emergency! fic called "Double Fantasy" has character John Gage being switched into the "real" world, where he and his whole world are fictional TV show characters, while actor Randolph Mantooth is trapped in John's world, where John and the rest of the characters are real people.

    Films — Live-Action 

    Gamebooks 
  • Most of the adventures in the Lone Wolf series take place on the world of Magnamund in the plane of Ao. There are other planes of existence such as the Daziarn, a strange dimension divided into mini-dimensions that have almost nothing in common, and the Plane of Darkness, which is basically Hell and the hometurf of Naar the King of the Darkness.

    Literature 
  • Of Ducks and Universes has an alternate universe (at least one) with alternate selves of people born after a certain date (when the universe split into two.)
  • Narnia is another dimension in C. S. Lewis's The Chronicles of Narnia series of books, with specific rules about time. Indeed, the sixth book, The Magician's Nephew provides a very good fantasy description of dimensional travel, likening the space between worlds to the rafters in a block of townhouses. The titular magician also makes it clear that Narnia, Charn, and similar worlds have no geographical relationship to our world at all.
  • Peter F. Hamilton's The Night's Dawn Trilogy incorporates a wide variety of these (scientifically dubbed "continuum's"). The most prominent is the "Beyond", where most souls end up after leaving the body. It's non-spatial, but it has time, so that the souls of the dead are aware of the passage of time but have nothing to do but leech on to each other's memories for the feeble semblance of life that they have.
    • The Dark Continuum is as close to an actual Hell as it gets. This is a dimension of near-absolute entropy, where the souls of whoever ends up there are compressed into a zero-Kelvin mass of writhing agony called the Melange. In case you are wondering, yes, they are also fully aware.
    • There are also various "pocket universes", not much bigger in volume than a planet, where the Possessed transport the worlds that they steal.
  • The Lives Of Christopher Chant by Diana Wynne Jones uses a similar "place between" which is clearly written in reaction to The Magician's Nephew's quiet, sleepy Wood Between the Worlds; it's misty, muddy, slippery and somewhat dangerous terrain. There are definitely no guinea pigs.
  • A Wrinkle in Time features a trio of mysterious guardians who are able to transport the protagonists through space via the fifth dimension. According to them, they are able to tesser, or "wrinkle," by bending space around so that they're in another place in an instant. As one character states: "A straight line is not necessarily the shortest path between two points."
  • Most of Clive Barker's stories revolve around traveling to and from another dimension, whether through a rug, painting, etc.
  • The Chronicles of Amber: After walking a sentient maze and gaining the ability to do so (which nearly all the major characters have done), someone from either Amber or Chaos can walk from world to world, essentially willing the transfer from one to another. The transfer is gradual, but can do literally anything, including taking the traveler to a world whose mythology predicts the arrival of a deity who looks exactly like him or her. It's mentioned that no one is quite sure whether these dimensions actually exist before an Amber or Chaos resident enters it, but there is currently a sort of two-ended multiverse with Amber at one end and Chaos at the other, with the hundreds or thousands of worlds in between being more similar the closer they are, to both Amber and Chaos, and each other. And the laws of nature don't always work the same from one to another—for example, gunpowder doesn't ignite in Amber. Oh, and all of them except Amber and Chaos are called Shadows, because it's believed that they are only inter-dimensional shadows of the two true worlds.
  • In The Boy who Reversed Himself one could get to the fourth dimension by learning to step 'ana' or 'kata' (the extra directions added to make it 4D) and needed special glasses in order to see more than floating blobs, as our eyes weren't designed for the dimension. "Ana" and "kata" are the ancient Greek words for "up" and "down," respectively.
  • Kay Kenyon's The Entire and The Rose series involves humans discovering a manufactured universe called the Entire. The beings in charge apparently copied sentient species from Earth's universe (the titular Rose) so all the creatures of the Entire supposedly have counterparts elsewhere in our universe that humans just haven't found yet. And there's trouble actually getting to the Entire from the Rose because the beings in charge refuse to share that information. (Those beings themselves and some mysterious attackers called Paion coming from two other universes.)
  • H.P. Lovecraft liked this idea and inserted it into many stories, especially the Cthulhu Mythos. It was used not only to explain where the various Eldritch Abominations hid from the world, but also to explain some of the Alien Geometries of the various structures and beings he created.
  • Robert A. Heinlein's The Number of the Beast uses this as a Hand Wave for traveling The Multiverse.
  • * Brian Lumley's Necroscope and Titus Crow series.
  • The Myth Adventures series by Robert Asprin has multiple dimensions between which the protagonists often travel. Also, almost all the protagonists originate in different dimensions (Skeeve from Klah, Aahz from Perv etc.)
  • Kenneth Bulmer wrote a series about the Contessa Perdita di Monttevarchi, an interdimensional tyrant, and the various people who opposed here
  • According to Word of God, the races of Codex Alera all arrived in the lands of Carna from other dimensions.
  • In Wicked Lovely: Sorcha's high court, most halflings and sighted ones, a formerly-mortal dreamwalker named Rae and later Devlin and Ani's 'shadow court' live in a world known only as Faerie. It is also said that the dark court once resided there, but not during the events of the main series.
  • Other Dimensions connected to the Discworld include Death's Domain, Fairyland, The Dungeon Dimensions and Roundworld.
  • It is hard to take other dimensions more seriously than in Flatland.
  • The Jakub Wędrowycz stories feature at least one Another Dimension - it's a Medieval European Fantasy realm with some comedic twists.
  • The Territories in The Talisman. Both worlds tend to mirror each other such that doing one thing in one place causes a similar effect in the other. The inhabitants are also mostly the same apart from population differences.
  • In Jack Vance's Lyonesse trilogy, there is a long section set in Tanjecterly. It's a strange place where trees are different colors, and the heroine is menaced by grotesque, slime-eating creatures called Progressive Eels.
  • The concept of another dimension accessible only through special means by special people has been featured in Neil Gaiman's " Everything He's Ever written ".
  • The Mirrorworld Series: The Mirror World is an alternate version of Europe with 1700's politics...cameras, railroads, and airplanes. The primary mode of travel still appears to be horseback, though, and characters don't recognize modern guns or flashlights. Oh, and there's a whole range of supernatural races...
  • The Land of Stories take place in a world physically separate from the story’s version of Earth.

    Live-Action TV 
  • Buffy the Vampire Slayer / Angel:
    • The demons often hailed from some hell dimension or another; our heroes on Angel have visited at least three of them. Most of them have different rules on time. For example, on Buffy a demon continuously captured teens to use as slaves, working them until they're in their old age, then finally dumping them crazed and confused back into our world—all of which happened in a matter of a day or two, Earth-time. Also, Connor was sent to the worst dimension imaginable, and came out a couple weeks later as a teenager.
    • Glory's world , an H. R. Giger type dimension which we see bits of in the Season 5 finale of Buffy.
    • There is a running joke about shrimp entirely based on this premise, which has been liberally and enthusiastically embraced by online fandom at large: In "Superstar", when explaining the concept of alternate dimensions, Anya says: "You could have, like, a world with no shrimp. Or with, you know, nothing but shrimp."
      • In "Triangle", after Olaf was banished she said that he could have been sent to "the world without shrimp."
      • In the Angel episode "Underneath", Illyria talks about moving between dimensions, she said that she went to "a world with nothing but shrimp" but "tired of it quickly."
    • The episode "The Wish" introduces an alternate continuity timeline caused by Anyanka, which was supposedly destroyed when her demonic power source was destroyed. But it gets confusing because this alternate timeline is actually ALSO an alternate dimension, since the episode "Doppelg?land" has AU!Willow being pulled from that universe into the primary universe.
  • Fluidic space, the area inhabited by Species 8472 in Star Trek: Voyager. It's an alternate dimension, only accessed through portals established in the region itself.
  • Sliders is built on this trope.
  • Doctor Who
    • In the 2011 episode "The Curse of the Black Spot", a spaceship from one dimension was lodged in a pirate ship in ours.
    • Previously, Adric came from Another Dimension called E-Space, which is also where the Doctor left Romana and K9 Mark II.
  • Kamen Rider Ryuki and its adaptation Kamen Rider Dragon Knight both dealt with another dimension on the other side of Earth's mirrors.
  • Kamen Rider Decade is similarly about travelling to multiple other dimensions, all of which are merging into one. Tsukasa and co visit a new one every fortnight, with each dimension representing a Kamen Rider series.

    Tabletop Games 
  • Dungeons & Dragons (most notably Forgotten Realms) features planar travel, based on moral alignments, classical elements and various other things. Of course, the world that most of the action takes place in is the "middle ground". Or so all the Clueless berks think 'till they reach the Cage.
    • Mordenkainen's Magnificent Mansion!
  • White Wolf's Old World of Darkness games featured another set of dimensions called the Umbra, which was based very strongly on human perception, to the point where a shaman and a scientist in the same part of the deep umbra would see it as a surreal swirling nexus of spirit energy populated with arcane ghosts and a section of interstellar space populated by aliens, respectively.
    • The New World of Darkness has its own sets of dimensions. There's the Shadow Realm, which is like the Umbra, only it's nearly exclusively animistic. Then there's the Underworld, which is home to dead knowledge and concepts and the place where ghosts go when they've finished their business but aren't ready to pass on to their final reward. Then there's the Abyss, which is pretty much anti-reality. Then there's the five Supernal Realms, dimensions of pure magic. Then there's the Astral Realms, which are where the collective unconscious is made flesh. Then there's Arcadia, which is not the Supernal Arcadia and is a constantly shifting chaotic wasteland that plays home to The Fair Folk. Then there's the Hedge, the predatory gateway dimension between Earth and Arcadia. And on top of all that, apparently there's Hell.
    • Genius The Transgression has smaller Bardos — pocket worlds made of concepts disproved by science. The more prominent ones include an alien-inhabited Mars, the Hollow Earth (home to dinosaurs and cavemen and Nazis), and the Seattle of Tomorrow, which Lemuria tried to bring into this world with disastrous consequences.
  • Fate of the Norns: Ragnarok uses the nine worlds of Norse Mythology, located on the branches of the cosmic tree Yggdrasil, each one being its own dimension.
  • In Atlas Games' Feng Shui, players can travel through time by means of "The Netherworld", an alternate dimension made up of gray tunnels which lead to portals which allow access to and from our world at fixed points in time and space. The Netherworld is home to refugees from alternate timelines that have been erased from reality, including four siblings who ruled the earth in an Alternate History.
  • Warhammer 40,000's Warp is Another Dimension... 40k style. In essence, Hell. They use it for FTL travel. It doesn't always work. The ship might disappear then reappear, with everyone inside turned to dust from age. Or it might reappear hundreds to thousands of years later. Or appear at it's destination before it left. "Time" is a funny thing in the Warp. Not funny Ha-Ha.
  • The Astral Planes of Shadowrun.
  • The world of The Dark Eye consist of seven planes, generally imagined as concentric spheres. The first is unaccessible and "only" a core. The second is a place of raw elemental powers. The third is the one where all the mortal life happens. The fourth is where the souls of the dead rest. The fifth is where the gods dwell, and cosists the paradises particularly worthy mortal souls may be eccepted into. The sixth is the sky with its stars, and some lesser gods can be found here. The seventh sphere is hell, a realm of chaos and infernal cold (ice/cold being the opposite of life in this world's elemental philosophy). In effect, the entire world, from the gods down, is just a relatively insignificant speck in a universe that wants to destroy it.
  • In Nomine is a natural for this trope, possessing not only a Heaven and Hell, but also a Dream World known as the Marches, and even a "no-place" called Limbo for the souls of angels/demons who were killed and unable to return to their proper realm.
  • Jump Space in Traveller. Not much is known about it, as its main purpose is simply to justify Faster-Than-Light Travel.

    Video Games 
  • See also: Final Boss, New Dimension.
  • Many Silent Hill fans agree that the games take place in a place which is like reality but in some crucial ways different, and the term 'alternate dimension' is a convenient term to describe this, though there are many interpretations of just what that actually means and whether 'dimension' should be replaced with some other, more accurate, term.
  • The Combine from Half-Life 2 are a cabal of dimension-spanning Planet Looters, and the "nearby" — in 11-dimensional superstring terms, at least — Xen border-world is the neighboring dimension by which we discover on our own. Xen itself is nebula-like with giant floating asteroids above a bottomless void (and copious amounts of Scenery Porn). At the end of Half-Life 2 we also get a glimpse of the Combine Overworld which looks like a hellish realm dotted with multiple Citadels.
    • Xen is also used a a strong plot point since it's a necessary component for Earth-made teleporters. As Mossman explains in HL2, the Resistance "figured out how to use Xen as an unexpressed axis, effectively a "dimensional slingshot" so that we can swing around the border-world and come back into local space without having to pass through". At the end of Half-Life, the dimensional breach left by the resonance cascade was relatively tiny but enough for the Combine who forcibly tore it open and invaded (with the side effects being destructive portal storms and copious amounts of Xen fauna). It was still open in Episode Two when the Combine tried to call in reinforcements but the rebels screwed up their plans and used Black Mesa's old satellite array to seal it permanently.
    • It's worth noting that Xen isn't a "proper" universe; it's described as a "dimensional travel bottleneck", and is so small, in fact, that its atmosphere is dense enough to be breathable. Add to that the various chunks of planet and the xenofauna from a hundred different worlds, and the impression is that of a "bubble" of spacetime that someone happened to inflate and fill up with just enough material to allow habitability. It's not as unlikely as it sounds, given that we know the Nihilanth fled there to escape The Combine.
  • The Darkness features a hell like world that the Darkness resides in.
  • Wolfenstein (2009) involves a Dark World-like dimension called "The Veil". It is our world, just viewed from an inch or so down the fourth spatial axis. But that's not the Axis you should be worried about. There's also the Black Sun Dimension, a small, unstable universe being held together by the Black Sun at its center.
  • Galaxy Angel begins in EDEN, which consists of a lost civilization and the Transbaal Empire; Galaxy Angel II brings in two more dimensions, ABSOLUTE and NEUE.
  • Minecraft has the Overworld, the Nether, and the End.
    • The Nether is useful for being a quicker way to travel across the land. One block traveled in the Nether is equal to eight blocks traveled in the Overworld. The player can utilize this by constructing a portal in the Overworld leading to the Nether, travelling a certain distance within the Nether, and then constructing another portal leading back to the Overworld. When the player returns to the Overworld, they will have travelled eight times the distance traversed in the Nether.
  • The Myst games visit 'Ages' such as Stoneship (inhabited ship, embedded in an island), Mechanical (a clockwork fortress on the surface of the ocean), Riven (water on the five islands shies away from heat sources), Spire (flying, wind-carved ruinous mountains floating above a star), and Ahnonay (cleverly designed to appear to travel through time, to the uninitiated).
  • Two of the alien races from Star Control II come from Another Dimension: the Arilou come from Quasi Space, while the Orz come from a dimension that they refer to only as *below* (thanks to the trouble the Translator Microbes have with their language). The Arilou and the Orz might come from the same dimension, as the Orz say both of the two races are from *outside* and the Arilou are from *above*. It depends on the meaning of *outside*, though.
  • April Ryan of The Longest Journey jumps between "our" world (Stark) and the mystic Arcadia repeatedly throughout the game. Interestingly, the game's backstory (explained after the first jump) describes a single world, where magic and science existed together. However, it was foreseen that utilizing both of these would result in the destruction of the world, so, with the help of the Draic Kin, the world was split into two main realities and several smaller "pockets" (either intentional or just leftovers). Stark became a world of science and logic, while Arcadia became a world of magic and chaos. Naturally, only humans beings can live in Stark, who have advanced to Twenty Minutes In The Future, while Arcadia is populated by all manner of fantasy creatures but is stuck in Medieval Stasis. The barrier between the worlds must be constantly maintained, though, as it is clearly unnatural. At some point in the future, the worlds will be re-joined.
  • In City of Heroes, quite a few of the high-level missions involve visiting other dimensions or fighting invaders from them.
    • As well as the Shadow Shard, a series of 4 zones set in an alternate dimension that may very well be the mind of a god, inhabited by aspects of his personality.
    • Also, there is the interdimensional dance club Pocket D, a neutral zone where heroes and villains can get together but are incapable of attacking one another.
  • There's a very literal example in Super Paper Mario where Mario's special move is to "warp" the otherwise flat world, revealing its third dimension. There's also Bestovius, Dimentio and Merloo, who all have dimension-flipping powers! It's quite popular in this game.
  • Two alternate dimensions appear in Super Mario RPG, the Factory where the Smithy Gang came from, and Vanda, where Final Fantasy-inspired Bonus Boss Culex originates from. Mario and his friends (and Bowser) only visit the Factory, the battle against Culex takes place in a rift between Vanda and the Mushroom World.
  • In the original SNES Star Fox, there is a secret level titled "Out Of This Dimension" that has to be seen to be believed.
  • In Runescape, there exists a series of gates to the Fairy dimension Zanaris, which itself has a central 'hub' to travel to other, decidedly more hostile dimensions, such as the Abyssal Zone, Dimension X, which is host to horned kangaroos, and even a forest. A forest dimension.
  • The Dark Place from Alan Wake is a bizarre realm "beyond the shores of our reality". It is home to more than a few dark entities of calamitous intentions and it is by nature "fluid", constantly shifting according to the whims and thoughts of its inhabitants; works of art created here or at contact points with our reality (such as Cauldron Lake) can influence reality by coming true. The protagonist, a novelist, writes a book that comes true over the course of the game, and once in the Dark Place itself, finds himself surrounded by words and ideas that he can turn into physical reality, and manifestations of his own fear and hopelessness coming to kill him. It's stated repeatedly that even though signals can travel from it to our reality, once you're in the Dark Place, it is next to impossible to leave, at least withou bringing something terrible along with you. By the time of Alan Wake's American Nightmare, two years after the first game, Wake has become much more adept at handling the Dark Place and its inhabitants. He is able to write himself as one of the protagonist of one of his works and travel back to our reality at a point of contact (this time near a town in Arizona), but it's hinted that this is not an actual escape and it's not even clear if the events of the game actually took place.
  • Clive Barker's Undying has both Oneiros and Eternal Autumn, magical realms that are either enslaved or created by two mages in the story, Keisinger and Bethany.
  • In the Sonic the Hedgehog series, while the two Sonic Rush games feature an Alternate Universe, Sonic Rivals 2 is about Eggman Nega plotting to free a demon that was trapped in Another Dimension Some theories and other media sources suggest that the Special Zone is Another Dimension. There's also the Twilight Cage from Sonic Chronicles, which seems to collect powerful civilizations from several dimensions.
  • Magician's Quest: Mysterious Times has the spirit world, which crosses over with the real world during Mystery Time. During Mystery Time, new bugs and fish appear (including VAMPIRE SQUID), characters from the spirit world appear in the town and require your help, and Mr. Graves (the sleeping skeleton in the room with the organ and locker) wakes up to teach extracurricular classes. Oh yeah, did I mention that the sky turns an otherworldly shade of red?
  • Dark Aether of Metroid Prime 2 is a Death Dimension that literally sucks the life from anything that enters it. It is home to the Ing, spiderlike Legions of Hell that possess creatures of the "Light World" so that they can enter it, as our dimension is just as lethal to them.
  • Used in the SNES Shin Megami Tensei games a lot. Majin Tensei II had 2 alternate dimensions. Amnesia and Paranoia. Amnesia is the realm of the Angels and Paranoia is Lucifer's domain.
  • Super Robot Wars NEO treats Earth Tear from Lord of Lords Ryu Knight this way.
  • The Super Mario World ROM Hack series The Second Reality Project features the titular Second Reality. The remake of the first game introduces Thirdspace into the plot.
  • MOTHER has Maria's Magicant.
  • Kirby's Return to Dream Land has the final stage, literally named "Another Dimension", which serves as the game's resident Amazing Technicolor Battlefield.
  • Duel Savior Destiny begins when Taiga and his sister are both dragged into the root world by a mysterious red book. It appears to be much smaller and less populous than Earth, but as the core world whatever happens there happens to the outer worlds eventually.
  • The later installments of the Dark Parables series have begun sending the detective into these. The fourth game had her visit "Fairy Tale Land," and the fifth game trapped her for almost half the game in the "Mirror World."
  • The Surface game series by Elephant Games are built on this trope. The premise of the games featured the protagonist getting transported to another dimension, usually by supernatural means, and figuring out how to get home. Each game had its own spin on the alternate dimension and stand alone in the series.
  • The 10th Dimension in Crash Twinsanity. Containing twisted versions of (at least) N.Sanity Island & Slip-Slide Icecapades. May also count as a Dark World due to the similarities when compared to the regular dimension.
  • The Matrix Path Of Neo has one in the Merovingian's chateau, it has it's own Bizarrchitecturefloating maze inside it.

    Web Comics 
  • This is the main plot of the comic Emergency Exit.
  • Sluggy Freelance introduced the Dimensional Flux Agitator, a device that opens portals to other dimensions at random, in its second chapter. The device has been brought back many times since then, to the point where a full fledged multiverse has developed.
  • El Goonish Shive has a sub-plot involving alternate dimensions - however it's really just used as another name for Alternate Universes.
  • Unicorn Jelly and its spinoffs are set in other-dimensional realms with their own unique physics.
  • In Planes Of Eldlor, demons from another dimension are trying to break into the world.
  • This is the premise of Between Two Worlds.
  • Richard once got banished to the Plane of Suck.
  • As of Act 6, Homestuck has three currently known parallel universes, two of which have an Alternate Universe apiece. Each universe also has an Incipisphere attached to it. The Incipispheres are separate from each other, but all of them are in the Furthest Ring outside normal reality. And there's also "the real world", which is inhabited by the author.
  • Jenny Everywhere, the open-source subject of many webcomics, exists in all possible dimensions and can shift between them.
  • Among The Chosen features planets with multiple layers of 3D space, so a planet like Earth has alternates in 4D space. Or something.
  • Blindsprings has the forest otherworld in which Tamaura lives at the start of the story.

    Web Original 
  • The Torn World is depicted this way in Dino Attack RPG. It is a mysterious dimension where bricks go when they are torn out of the Constructopedia. For some reason every piece breaks up into single-stud bricks (though people are not affected by this phenomenon), which float in the middle of an empty void resembling space, though anything else is still affected by gravity.
  • The Gamers Alliance has several planes of reality, including the Land of the Living, the Land of the Dead, the Void, the High Plane, and the Demon Realm among others.
  • Creturia, the parallel world from Dimension Heroes.
  • Similar to Sliders, the whole point of AH.com: The Series.
  • Adylheim has a great deal of these, including a cosmarchy spanning five alternate realities.
  • Felarya is described as a "dimensional plane". Hell and Heaven are both separate dimensions, which mimic the various belief systems of those who arrive there.
  • Killer Monster from DSBT InsaniT resides in one that is essentially Hell.
  • Dreamscape has a few, like the Possessor Ghosts realm, which is the ruins of a fortress in a white void, and the Unworld, a bleak world of torment and psychological torture.
  • In Worm, a Gadgeteer Genius named Haywire managed to make a communications link between two Alternate Timelines — they are then dubbed Earth Aleph and Earth Bet.
  • The Cartoon Man saga involves an Alternate Tooniverse known as the Second Dimension.

    Western Animation 
  • Teenage Mutant Ninja Turtles had a villain who came from "Dimension X", a world accessible through glowing portals.
  • One famous Halloween episode of The Simpsons has Homer entering the third dimension. After causing that dimension to collapse, he ends up in the "real" world, "the worst place yet."
    • Like many Simpsons Halloween sketches, this was a parody of a Twilight Zone episode.
  • Raven of the Teen Titans comes from one of these. She has threatened to deport Beast Boy to Another Dimension. She goes to what certainly looks like Another Dimension to deliver a glorified cell phone. Maybe it's so easy for her because she is a living, humanoid interdimensional portal.
  • In Jonny Quest: The Real Adventures episode "Other Space," scientists open a portal to another dimension, complete with inhabitants that want to take over our dimension.
  • In the W.I.T.C.H. TV show and comics that inspired it the Five Girl Band are appointed as Guardians of the Veil (later Guardians of the Infinite Dimensions in the show to police their Multiverse and prevent various bad guys and the occasional Eldritch Abomination from messing things up. In this case "dimensions" seems to mean planes of existence instead of alternate universes as Human Aliens are rarely encountered. Most dimensions fit the fantasy archetype to some degree or another but one world in the comics was an almost literal case of Alien Geometries.
  • The Cowboy Universe from Futurama is identical to our own, except everyone is dressed like a cowboy. While it's described as the only parallel universe in existence, later episodes RetConned it. So it's most likely an Alternate Dimension, given that it's viewable from the edge of the universe.
    • Word of God says that the cowboy universe is the only PARALLEL universe. The others were PERPENDICULAR universes.
  • Avatar: The Last Airbender has the Spirit World, a dimension parallel to the one the characters live in. It's home to most of the Avatar world's spirits, and the former incarnations of the Avatar itself, and seems to operate on a completely different kind of physics. The titular Avatar is the bridge between the show's two dimensions, as a spirit of the planet, who takes on human forms to better understand humanity. We only ever see Aang visit the Spirit World, but it's heavily implied that Iroh has been there as well, presumably indicating anyone can get there if they try hard enough. There are also several spirits (Wan Shi Tong, Twi, La, and Hei Bai) who have visited the physical world.
  • Adventure Time has Lumpy Space, the Land of the Dead (plus at least forty-nine other dead worlds apparently), the Crystal Dimension, and the Nightosphere.
  • In Barbie And The Secret Door, the Secret Door leads to the magicla kingdom of Zinnia.

    Real Life 
  • In string theory, which is the highly speculative Hot New Thing in theoretical physics for the last few years, our visible cosmos is located in a ten- or eleven-dimensional hyperspace, which may contain an arbitrary number of other continua, with varying kinds of matter, forces, and numbers of dimensions.


Subspace or HyperspaceFaster-Than-Light IndexHyperspace Is a Scary Place
Alternate UniverseOtherworld TropesA Planet Named Zok
Alternate World MapSettingsPocket Dimension
Animalistic AbominationOlder Than DirtAnthropomorphic Personification
Saint Seiya OmegaImageSource/Anime & MangaSaitama Chainsaw Shoujo
Otherworld TropesSpeculative Fiction TropesMetaphysical Place

alternative title(s): Alternate Dimension; Other Dimension
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