A good top secret base needs to be really hard to access. Active volcanoes are a very good way to do this, as the constant supply of tons of lava make for a good defense system (except for the inhabitants) and source of energy. Said volcanoes are also more than likely to be in such inhospitable places as Mordor or a remote island. As well, the fact that volcanoes are attached to the earth makes an Elaborate Underground Base all the more easier.

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Examples:

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[[folder:Literature]]

• The eponymous Higher Instutute of Villanous Education is of the remote island variety.

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[[folder:Video Games]]

• Dr. Eggman has a few of these. Included are Lava Shelter from Shadow The Hedgehog and Lava Powerhouse from Sonic Spinball.
• Gol and Maia's Citadel from the original Jak And Daxter is one of these, although it was transformed from a Precursor city.

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