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 Everything's Cooler With Lava. Usually Supervillain Lair, but not always. Naturally predisposed to become a Collapsing Lair. Most feature labyrinthine cave complex, Lava Pits and use of free heat. Often done in a rather careless manner. May or may not be located on an island. In a video game, becomes Lethal Lava Land.
Examples:Anime and Manga
- Great Mazinger: Marquis Janus, one of the villains of the Mazinger Z sequel had an Island Base 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 The Hero Tetsuya as he battled.
- Kotetsu Jeeg: Queen Himika's Home Base was inside a volcano.
- Starscream's temporary base in Transformers Cybertron is located on a volcanic island in the Pacific. Since he and his minions are giant alien robots, the heat is not an issue. Hell, Thunderblast enjoys bathing in the lava.
- Used interestingly in one Buck Danny 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.
- Dr. Brainstorm and Jack of Calvin and Hobbes: The Series reside underneath Old Faithful.
- Plan 7 of 9 from Outer Space. Journalist Buster Kincaid is delighted to find that the suspected Big Bad had an Elaborate Underground Base in Antarctica's Mount Terror.
- Austin Powers — Dr Evil's Island Base
- Disney version of Twenty Thousand Leagues Under the Sea — Captain Nemo's island
- Spy Kids 2 (Island Base)
- You Only Live Twice — Blofeld
- The Incredibles — Syndrome's base at Nomanisan Island. Mr. Incredible directly asks Syndrome's Sexy Secretary 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.
- Dragonriders of Pern 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 Evil Overlord in The Last Hero, 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 H.I.V.E. Series is one.
- The villain Moltor of Power Rangers Operation Overdrive bases his operations inside one of these, in sharp contrast to his brother Flurious, who resides inside of an icy cave lair.
- Dungeons & Dragons
- 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.
- Forgotten Realms — Firenewts live in volcanic mountains. Because they need lava pit-grade heat.
- Red dragons, being immune to fire, prefer hot lairs including volcanoes.
- Subverted in No One Lives Forever 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 who is actually the shaman of the area, driven insane from guilt.
- Mega Man's Dr. Wily had a couple, with at least two in the Mega Man Battle Network series.
- In the Super Mario Bros. series games, Bowser's castle is usually found inside a volcano.
- Dark Crater from Pokemon Mystery Dungeon Explorers of Time/Darkness/Sky.
- Pokémon Emerald: Team Magma's headquarters is located in Mount Chimney, specifically because that's where Groudon is.
- The Elder Scrolls III: Morrowind has the Big Bad's Very Definitely Final Dungeon in the crater of a volcano.
- Dr. Eggman has built a few of these, such as in Shadow the Hedgehog and Sonic Spinball.
- The second Island Base in Evil Genius is built around a volcano (the inside of which serves as your rocket silo).
- Minions at Work as a comic about going-on in Supervillain Lairs featured volcanic lair of Doctor Coldblood time and again, with lots of jokes about its volcano nature.
- The Original Gobwin Knob in Erfworld was built on an extinct volcano.
- Dan and Mabs Furry Adventures lampshaded this with Dr. Jyrras explaining why he specifically chose an extinct volcano for his Island Base:
After all, 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.
- Dresden Codak had Kimiko's dream, where she says who she wants to be when she grows up:
Kimiko: A robopsychologist like Susan Calvin from Asimov's Robot Series. Except [...] I'd live on an island with a volcano for power.
- One shows up in Genocide Man.
Dr. Fumiaki: Then welcome to Corvo Island. Part volcano, part laboratory ... well, pretty much just those two things.
- In the My Little Pony TV show and movie, witches lived in the Volcano of Gloom.
- The titular Superjail! is inside a volcano that's inside another volcano.