The Peak Cavern, also known as the Devil's Arse, is one of the four show caves in Castleton, Derbyshire, England. Peakshole Water flows through and out of the cave, which has the largest cave entrance in Britain.

Why is it called the Devils ARSE?

Unlike the other caves in the area, Peak Cavern is almost completely natural. ... Originally called “Devil's Arse” due to the flatulence-like sounds that emanate from within the caverns, the name was changed in 1880 to “Peak Cavern” in order to avoid causing the then visiting Queen Victoria any offence.

What was filmed at Peak Cavern?

On Tuesday 18th December 2012, a production team from the BBC went into Peak Cavern to undertake some filming for the Horizon Series. The documentary was about hydrolic fracturing or Fracking and the filming itself started with a session up at Mam Tor where the shale is very evident.