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.
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!!Examples:

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[[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 ''TransformersCybertron'' is located on a volcanic [[IslandBase island]] 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.

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[[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]].

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[[folder: Film ]]

* ''AustinPowers'' -- Dr Evil's IslandBase
* Disney version of ''Film/TwentyThousandLeaguesUnderTheSea'' -- Captain Nemo's island
* ''SpyKids 2'' (IslandBase)
* ''Film/YouOnlyLiveTwice'' -- Blofeld

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[[folder: Films -- Animation ]]

* ''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.

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[[folder: 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 [[HIVESeries Higher Institute of Villainous Education]] is one.

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[[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.

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[[folder: Tabletop Games ]]

* ''DungeonsAndDragons''
** ''{{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.
** ''ForgottenRealms'' -- Firenewts live in volcanic mountains. Because they need {{lava pit}}-grade heat.
** Red dragons, being immune to fire, prefer hot lairs including volcanoes.

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[[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.
* ''{{MageCraft}}'' has a secret weapons lab variant. Justified as they can quickly destroy the research if things get out of hand.
* ''{{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 ''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.
* In the ''Videogame/PokemonPeaceSquad'' games, every Team Magma base is this. Team Rocket also had one in Trinity. There's also the Lava Shelter multiplayer stage in PPS 1 and 2.
* ''VideoGame/TheElderScrollsIIIMorrowind'' has the BigBad's VeryDefinitelyFinalDungeon in the crater of a volcano.
* [[SonicTheHedgehog Dr. Eggman]] has built a few of these, such as in ''VideoGame/ShadowTheHedgehog'' and ''VideoGame/SonicSpinball''.

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[[folder: Web Comics ]]

* ''{{Minions at Work}}'' 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 ''{{Erfworld}}'' was built on an extinct volcano.
* ''{{Dan and Mabs Furry Adventures}}'' 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.

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[[folder: Web Original ]]

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

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[[folder: Western Animation ]]

* In the MyLittlePony TV show and movie, witches lived in the Volcano of Gloom.
* The titular ''{{Superjail}}'' is inside a volcano that's inside ''another'' volcano.

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