Carved out from the the subterranean, bat-infested limestone carverns that run beneath his family estate, Wayne Manor, the Batcave is a sprawling underground headquartes equipped with the latest vehicles, weapons, and technology to help Batman in his constant crusade against crime.
The original Batcave was destroyed during the earthquake that leveled half of Gotham City. The new Batcave is a multi-level bunker, powered by its own hydrogen generators. Housing a vast array of vehicles, scientific equipment, a forensics lab, medical facilities, and trainning systems throughout its multi-tiered labyrinth, the Batcave's centrepice is the central computer terminal.
This is powered by seven Cray T392 mainframes, and incorporates a holographic projector. Stored on the computer is Batman's vast archive of crime and criminals.
For a time, Batman hired the hunchbacked mute Harold Allnut, a technological genius, to work in the cave. Harold was duped into revealing Batman's secrets to the villain Hush in exchange for a voice and a new body, and was murdered by the criminal. While several heroes--and a handful of villains--have seen the inside of the Batcave, very few know where it actually exists.