Wookey Hole Caves

Tapping noises, the sound of someone dragging themselves along and the ghost of Irish potholer have been reported; this latter spectre was met by a TV director who, along with his wife, arranged to be locked in the caves alone so that he could scout for locations for a 1974 Doctor Who story. Other phantoms include former workers at the mill, a young girl in the basement and lower floors, and a mentally ill man in the Magical Mirror Maze.

Link: Somerset Live