The Batcave is a central location in the Batman franchise. Its existence is purely accidental. Back in the days of the 1940s Batman film short serial, the producers wanted to have a hanger. They couldn’t afford one, but they did have a cave set lying around the studio. So in the second chapter of the series, the show unveiled the Batcave. A few months later, comic book artist Bob Kane worked it into the comic book series.