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[[quoteright:350:[[Film/YouOnlyLiveTwice http://static.tvtropes.org/pmwiki/pub/images/artwork_james_bond.png]]]]
[-[[caption-width-right:350:The base no self-respecting supervillain can do without.]]-]
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->'''Mr. Incredible:''' I've been meaning to ask you. Of all places to settle down, why... \\
'''Mirage:''' A volcano? My employer is attracted to power. As am I. It's a weakness we both share. \\
'''Mr. Incredible:''' Seems a little... unstable. \\
'''Mirage:''' I prefer to think of it as misunderstood. \\
'''Mr. Incredible:''' Aren't we all?
-->-- ''WesternAnimation/TheIncredibles''

Some people want to live not at volcano's feet, but ''in'' a volcano. Whether it's active or extinct. After all, a crater inside some big mountain is a relatively defensible location, there's plenty of free geothermal power, it looks impressive, and [[LavaAddsAwesome Everything's Cooler With Lava]]. Usually SupervillainLair, but not always. Naturally [[ChekhovsVolcano predisposed]] to become a CollapsingLair.

Most feature [[ElaborateUndergroundBase labyrinthine cave complex]], {{Lava Pit}}s and use of free heat. Often done in a [[ConvectionSchmonvection rather careless manner]]. May or may not be located [[IslandBase on an island]]. In a video game, becomes LethalLavaLand.


[[folder: Anime and Manga]]
* ''Anime/GreatMazinger'': Marquis Janus, one of the villains of the ''Anime/MazingerZ'' sequel had an IslandBase with an artificial volcano built on the center. Its eruptions could be set off and stopped at will. Often it was used to blast Great Mazinger with a rain of hot-molten rocks, debris and volcanic cinders in order to slow down its advance or hinder TheHero Tetsuya as he battled.
* ''Anime/KotetsuJeeg'': Queen Himika's HomeBase was inside a volcano.
* Starscream's temporary base in ''Anime/TransformersCybertron'' is located on a volcanic {{island|Base}} in the Pacific. Since he and his minions are giant alien robots, the heat is not an issue. Hell, [[DarkChick Thunderblast]] enjoys bathing in the lava.
* In ''Franchise/{{Pokemon}}'', Blaine set up his gym inside the volcano of Cinnabar Island. Not surprisingly, he specializes in [[ElementalRockPaperScissors Fire-type Pokemon]]. Many other Fire-type-specializing Gym Leaders also set up their gyms in volcanoes or similar.

[[folder: Comic Books]]
* Used interestingly in one ''ComicBook/BuckDanny'' story. While flying, Buck spots a smoking volcano island and flies over it, taking pictures to send to volcanologists. Which is how he discovers the volcano isn't active but used as a secret base by the bad guys, who use smoke emitters to disguise their operations.
* Franchise/XMen villain ComicBook/{{Magneto}} had a base hidden within a volcano near the Savage Land, which he could easily get in via his magnetic powers. He once held the All-New All-Different X-Men prisoner here, but in their escape and subsequent battle with Magneto, the base was destroyed after devices meant to keep the lava away were destroyed.

[[folder: Fan Fic ]]
* Dr. Brainstorm and Jack of ''Fanfic/CalvinAndHobbesTheSeries'' reside underneath Old Faithful.
* ''Plan 7 of 9 from Outer Space''. Journalist Buster Kincaid is delighted to find that the suspected BigBad had an ElaborateUndergroundBase in Antarctica's [[NamesToRunAwayFromReallyFast Mount Terror]].

[[folder: Films - Live-Action ]]
* ''Film/AustinPowers'' -- Dr Evil's IslandBase -- obviously based on Ernst Stavro Blofeld's base in ''Film/YouOnlyLiveTwice''.
* Disney version of ''Film/TwentyThousandLeaguesUnderTheSea'' -- Captain Nemo's island
* ''Film/SpyKids 2'' (IslandBase)
* In ''[[Film/{{Fantomas}} Fantômas Unleashed]]'', Fantômas built his lair in a volcano in Italy, which he leaves in his FlyingCar just as the volcano erupts.
* In ''Film/YouOnlyLiveTwice'', the SPECTRE base is built inside a volcano. It predictably erupts in the climax and provides the trope's image.

[[folder: Films -- Animation ]]
* ''WesternAnimation/TheIncredibles'' -- Syndrome's base at Nomanisan Island. Mr. Incredible directly asks Syndrome's SexySecretary why he'd build his home at a volcano, and she respond it's because he's attracted to power, as well as the rich soil that lets them grow delicious food on the island.

[[folder: Literature ]]
* ''Literature/DragonridersOfPern'' has all "classic" Weyrs made this way (one of the rare occurrences of this trope with ''extinct'' volcanoes,) but not early or later ones.
* Evil Harry Dread, the low-budget EvilOverlord in ''Discworld/TheLastHero'', complains that ''other'' Dark Lords somehow manage to get volcano lairs even when the local geology is completely wrong for them.
* The eponymous Higher Institute of Villainous Education in the ''Literature/HIVESeries'' is one.
* ''Literature/{{Redwall}}'' has Salamandastron, the Long Patrol/Badger Lord base, built in an extinct volcano on the coast.

[[folder: Live Action TV ]]
* The villain Moltor of ''Series/PowerRangersOperationOverdrive'' bases his operations inside one of these, in sharp contrast to his brother Flurious, who resides inside of an icy cave lair.
* ''Series/{{Airwolf}}'''s normal hangar is inside a long-extinct volcano. Justified because the tapering shape of the interior cavern is ideal for a concealed helipad; unless a satellite or search aircraft happened to overfly it right as Airwolf were taking off or landing it's almost totally invisible.

* ''Radio/BleakExpectations:'' During series 4, BigBad Mister Benevolent finds a volcano on a dessert (as it, it's actually made of dessert) island. For reasons he can't properly explain, he felt the need to add a self-destruct option that anyone could touch. And naturally, it gets set off.


[[folder: Tabletop Games ]]
* ''TabletopGame/DungeonsAndDragons''
** ''TabletopGame/{{Dragonlance}}'' -- The biggest Minoi settlement around is Mount Nevermind. A combination of their smokepowder storage facility and one angry red dragon led to reactivation of the volcano and subsequent discovery of useable geothermal energy.
** ''TabletopGame/ForgottenRealms'' -- Firenewts live in volcanic mountains. Because they need {{lava pit}}-grade heat.
** Red dragons, being immune to fire, prefer hot lairs including volcanoes.

[[folder: Video Games ]]
* Subverted in ''VideoGame/NoOneLivesForever 2''. It looks like this but, as it turns out, the actual lava pit inside the base would be too troublesome -- so the villains use synthetic lava instead.
* ''VideoGame/{{MageCraft}}'' has a secret weapons lab variant. Justified as they can quickly destroy the research if things get out of hand.
* ''Videogame/{{MARDEK}}'' has at least one NPC who lives in a volcano, a mad hermit [[spoiler:who is actually the shaman of the area, [[MyGodWhatHaveIDone driven insane from guilt]]]].
* ''VideoGame/MegaMan's'' Dr. Wily had a couple, with at least two in the ''VideoGame/MegaManBattleNetwork'' series.
* In the ''Franchise/SuperMarioBros'' series games, [[BigBad Bowser's]] castle is usually found inside a volcano.
* [[spoiler: Dark Crater]] from ''VideoGame/PokemonMysteryDungeonExplorers of Time/Darkness/Sky''.
* ''[[VideoGame/PokemonRubyAndSapphire Pokémon Emerald]]'': Team Magma's headquarters is located in Mount Chimney, specifically because that's where [[OlympusMons Groudon]] is.
* ''VideoGame/TheElderScrollsIIIMorrowind'' has the BigBad Dagoth Ur's VeryDefinitelyFinalDungeon within [[{{Mordor}} Red Mountain]], a massive shield volcano with an ancient [[OurDwarvesAreDifferent Dwemer]] city complex built into it.
* [[Franchise/SonicTheHedgehog Dr. Eggman]] has built a few of these, such as in ''VideoGame/ShadowTheHedgehog'' and ''VideoGame/SonicSpinball''.
* The second IslandBase in ''VideoGame/EvilGenius'' is built around a volcano (the inside of which serves as your rocket silo).
* After his sudden [[ObviouslyEvil yet inevitable]] betrayal, Premier Cherdenko of ''VideoGame/CommandAndConquerRedAlert3'' takes refuge in his secret volcano fortress, which comes equipped with a full suite of military production structures, [[TheMoaiTheMerrier Moai heads that shoot infantry]], a [[NukeEm Vacuum Imploder]], and a fortified redoubt inside the volcano's caldera, just in case.
* The Dark Being's lair near the end of ''VideoGame/LighthouseTheDarkBeing''. It's also polluting the area around it.
* It's hard to find a ''VideoGame/DwarfFortress'' player who ''hasn't'' built one of these at least once.
* Old Hell in ''VideoGame/{{Touhou}}: Subterranean Animism'' has been turned into a geothermal power complex. While the deeper magma chambers are active, the level is regulated and the main shaft is stable enough to house an elevator.

[[folder: Web Comics ]]
* ''Webcomic/MinionsAtWork'' as a comic about going-on in {{Supervillain Lair}}s featured [[http://www.minionsatwork.com/2011/01/minions-256-where-theres-smoke.html volcanic lair]] of [[MorallyAmbiguousDoctorate Doctor]] [[LizardFolk Coldblood]] time and again, with lots of jokes about its volcano nature.
-->'''Minion No. 1''': [[http://www.minionsatwork.com/2011/07/greetings-molten-yes-were-late-again.html I totally told you, WE LIVE IN A VOLCANO! There's NO SUCH THING as a "minor plumbing problem"!]]
* The Original Gobwin Knob in ''{{Webcomic/Erfworld}}'' was built on an extinct volcano.
* ''Webcomic/DanAndMabsFurryAdventures'' lampshaded this with [[ShowWithinAShow Dr. Jyrras]] [[http://www.missmab.com/Comics/Vol_442.php explaining]] why he specifically chose an ''extinct'' volcano for his IslandBase:
--> After all, [[SarcasmMode nothing quite says "intelligent"]] like having 70 billion dollars of equipment next to an unstable volcano!
** To make it ''look'' active however, he filled the crater with bright orange pillows.
* ''Webcomic/DresdenCodak'' had [[http://dresdencodak.com/2009/04/19/onald-creely/ Kimiko's dream]], where she says who she wants to be when she grows up:
-->'''Kimiko''': A robopsychologist like Susan Calvin from [[Literature/IRobot Asimov's Robot Series]]. Except [...] I'd live on an island with a volcano for power.
* One shows up in ''Webcomic/GenocideMan''.
--> '''Dr. Fumiaki''': Then welcome to Corvo Island. Part volcano, part laboratory ... well, pretty much just those two things.

[[folder: Web Original ]]
* [[http://www.villainsource.com/lairs.html Villain Source]] -- volcano IslandBase

[[folder: Western Animation ]]
* In the Franchise/MyLittlePony TV show and movie, witches lived in the Volcano of Gloom.
* The titular ''WesternAnimation/{{Superjail}}'' is inside a volcano that's inside ''another'' volcano.
* In ''WesternAnimation/DefendersOfTheEarth'', the Defenders' base, Monitor, was built inside a dormant volcano.
* The Forge from ''WesternAnimation/StevenUniverse'' is a volcano lair used by Bismuth to forge the Crystal Gem's non-summon weapons and upgrade existing weapons, having made Rose's sword, upgrades to Garnet, Amethyst and Pearl's weapons and [[spoiler:the Breaking-Point, a hand-held super-weapon created with the express purpose of shattering gems]]. The entrance can only be opened by Bismuth, and because Bismuth is a gem created specifically for construction and smithing, her body can withstand high temperatures and is able to touch molten-hot materials undeterred.

[[folder: Real Life]]
* During the Battle of Iwo Jima late in UsefulNotes/WorldWarII, the Japanese garrison based on the island had built a network of caves and tunnels throughout the island, including the volcano, known as Mt. Suribachi. at the southern point of the island. The volcano itself was used as a headquarters and rallying point early in the battle, until it was taken by the US Marines storming the island 5 days into said battle.
* While not a volcano the [[https://en.wikipedia.org/wiki/Cheyenne_Mountain_Complex Cheyenne Mountain Complex]] fits the general idea of a base within a hollowed out mountain.
* The Arecibo Radio Telescope occupies the crater of an extinct volcano in Puerto Rico.