[[quoteright:350:[[VideoGame/LegendOfLegaia http://static.tvtropes.org/pmwiki/pub/images/rsz_aqualith_7168.png]]]]
[[caption-width-right:350:The entire lake was created by that single stone.]]

->''"There's water in a lake, water in a river,\\
Water in the deep blue sea.\\
But water in a rock--Lord! That's a miracle!\\
Who's got the miracle? We!"''
-->-- ''Theatre/AnyoneCanWhistle'', "Miracle Song"

A Rock of Limitless Water is a rock, stone, or other similar object that [[ExactlyWhatItSaysOnTheTin emits a steady stream of water]] from itself. Such an item is generally held as an object of reverence, either from a [[{{God}} deity]], [[CosmicKeystone other mystical force]], or perhaps [[EldritchAbomination something more sinister]]. These [[PlotDevice items]] are generally desired for their otherworldly powers by heroes and villains alike.

It doesn't have to be a rock, [[TropesAreFlexible the trope can fit]] any object that breaks expectations as a water source. So it shouldn't have be a bowl, cauldron, jar, etc. Rocks are popular due to the ElementalRockPaperScissors associations; their solid, dry lifelessness contrasted with lifegiving water.

Such an item can be found across media types, occurring in film, video games, and television alike. However, due to the nature of the trope, examples will generally occur in the genres of science fiction, fantasy, and/or religious scripture. As this trope is at least as old as Literature/TheBible and Myth/ClassicalMythology, this trope falls squarely into the realm of being OlderThanFeudalism, and possibly is OlderThanDirt as well.

These items, due to their immense power, are almost always going to be a PlotDevice or otherwise [[MacGuffin sought after]] at some point. A spring gushing from one of these is often a HealingSpring, or imbued with some other type of power. A related object is a PhilosophersStone. Whereas a Stone of Limitless Water is generally the mark of power of a deity or of magic, the Philosopher's Stone is the mark of the power of science or alchemy.

[[AC:{{Anime}} and {{Manga}}]]
* Lala-Ru's pendant in ''Anime/NowAndThenHereAndThere'' is sought after for its ability to produce large amounts of water.

[[AC:{{Comic Books}}]]
* A one comic in ''ComicBook/DisneyDucksComicUniverse'' had a solid stone bowl that gave away limitless water. Gyro Gearloose found out that the rock's surface turns normal evaporated water in the air into liquid water.

* A similar feature occurs in ''Film/{{Avatar}}''. The floating islands have waterfalls constantly flowing from out of them, despite not having a source for such water. In this case, there is a [[HandWave somewhat logical reason given]] for such behavior that does not justify the amount of water created.
* In ''Disney/AtlantisTheLostEmpire'', the core city is elevated above a volcanic flow, its waters endlessly spilling over into the similarly inexhaustible magma (and creating a huge cloud of steam as a result). When the city's power source is stolen, the water ceases.

* In one of the earliest examples of this trope, the Literature/BookOfExodus has Moses strike a rock with his staff, and by God's power, a waterfall begins spewing out.
* The ''Literature/{{Discworld}}'' appears to be a giant one of these, as ocean water constantly [[FlatWorld pours over the edge of the disc.]]

* Water Talismans in ''Fanfic/FalloutEquestria''. Due to irradiation of nearly all other water in the setting this makes them Priceless artifacts.

* In ''Series/TheMiraculousMellops'', the Moonlings had limited water and created a pill that replenishes a container of water up to 50 times. It got into a bowl of fruit punch and they needed to clean it out.

* Myth/GreekMythology:
** One legend involves Athena and Poseidon dueling over the patronage of the city that would become Athens. As part of said duel, Poseidon creates a sea from a rock.
** Another legend involves the winged horse Pegasus flying up to the top of Mt. Helicon and striking a rock with his hoof, creating a stream of water. It became known as the ''Hippocrene'', literally the "Fountain of the Horse".
** A third legend involves a woman named Niobe who [[BlasphemousBoast thought herself above the goddess]] Leto. To avenge this insult to their mother's honor, Apollo and Artemis flew from Olympus and smote each of Niobe's children. In her grief, Niobe turned into a stone constantly awash in tears.
* The legend of the [[https://en.wikipedia.org/wiki/Sanctuary_of_Our_Lady_of_Lourdes Lourdes Spring]] in France states that the Virgin Mary appeared to a young IllGirl by the name of Bernadette, and told her to dig in a particular spot. Bernadette did as she was told, and a HealingSpring began to come up where she dug with her bare hands. The spring is still there to this day, although the original spot is now protected by a sheet of Plexiglass.

* ''TabletopGame/CallOfCthulhu'' supplement ''Terror Australis'', adventure "City Beneath The Sands". The supernatural creature known as Power Boy can cause a spring to come out of a rock just by sticking his rangga (a ceremonial staff) into the rock.
* ''TabletopGame/DungeonsAndDragons''
** The Decanter of Endless Water mimics this trope. Though not the cheapest or most common of items, wizards can craft them without too much difficulty, making them less desirable than some on this list.
** In the 1st Edition supplement ''Oriental Adventures'', the shukenja spell ''Create Spring'' would cause a stream of fresh water to bubble forth from natural rock. Each ten minute period, the stream would produce 1 gallon per CharacterLevel of the shukenja who cast the spell.
** The Imaskari if the ''TabletopGame/ForgottenRealms'' were masters of dimensional and planar magic, and consequently hit upon their own version of this -- an inverted NoFlowPortal to the Plane of Water (with a function for shutting it off and activating it again). The rock aspect of this trope comes in with that this is ''not'' how portals usually work in D&D (normally they would let creatures but not water through rather than the other way around) and so breaks expectations savvy adventurers would have. The Imaskari did this with air, too.

* In ''Theatre/AnyoneCanWhistle'', one of these appears in a DyingTown, which causes a huge boom to tourism. The trope is subverted in that the water is actually being pumped in from behind the scenes.

* The Aqualith in ''[[VideoGame/LegendOfLegaia Legaia II: Duel Saga]]''. A stone found in the protagonist's hometown, it is actually [[spoiler:one of three stones needed to access the Source Forge, the beacon of creation in the world]]
* ''Franchise/TheLegendOfZelda'':
** In ''Videogame/TheLegendOfZeldaSkywardSword'', the town of Skyloft has a magic island spring that floats just above and supplies the river with an infinite amount of water.
** The top of Gerudo Town's palace in ''VideoGame/TheLegendOfZeldaBreathOfTheWild'' has a large boulder suspended over it, which dispenses water constantly into a series of canals. The water disappears when it reaches the wells at the ends of these canals instead of flooding them.
* The Crystal Stone in the first ''VideoGame/{{Paper Mario|64}}'' game is needed as part of a FetchQuest in the Flower Fields.
* The Sacred Orb in ''VideoGame/StarOceanTillTheEndOfTime'' is a prized treasure of the Kingdom of Aquaria. As an exceedingly powerful artifact, it is desired by each of the warring factions in the galactic war. [[spoiler:Later, it is revealed to be a debugging tool for use by the denizens of 4D Space.]]
* Played with in ''VideoGame/MouseHunt'', where there is an item called the Oasis Bead. It can draw water from any water source to itself.
* In ''VideoGame/DwarfFortress'', aquifers and to a lesser extent brooks[[note]]specifically the layer of walkable 'floor' tiles over the top of a channel full of water; it's a crude workaround for simulating a shallow, fast-flowing stream[[/note]] work like this in game-engine terms, with the slight difference that they will also ''absorb'' infinite water. Unlike most examples on this page, aquifers are usually more hindrance than help as it's impossible to dig through them without building an elaborate pumping system or abusing a glitch that happens when a chunk of terrain collapses.
* Though they don't seem to have any special significance, there are a number of floating islands in Nagrand in ''VideoGame/WorldOfWarcraft'' that have waterfalls continually coming off them.
* ''VideoGame/TalesOfVesperia'': The lower quarter in Zaphias uses one of these, the Aqua Blastia, for their water source, building a series of pipes and fountains around it. The plot kicks off when someone steals the part of the pumping station that controls flow, causing the neighborhood to be flooded.
* In ''Rhiannon: Curse of the Four Branches'', placing the restored cauldron in the right spot will cause a stream of water to pour our of a rock formation and fill it up.

* The ''Wiki/SCPFoundation''
** Inverted by SCP-402, which is a Rock of ''Absorbing'' limitless water.
** SCP-045 is a straight example, producing water when exposed to nitrogen in an environment with less than 380 atmospheres of pressure.

* Such an item appears in an episode of ''WesternAnimation/SamuraiJack'', the Neptune Jewel, and is the center of a heist in Episode XI ("Jack and the Gangsters").
* There is the Orb of Tornami in ''WesternAnimation/XiaolinShowdown''