Banwell Bone Cave is long and deep. The Bone Cavern itself is high and wide and 20 m long. It is approached through an early 19th-century archway. It contains an assemblage of bones of mammals (including bear, deer, ox, bison and reindeer) from the Pleistocene era (approximately 80,000 years ago). The cave has a large hole in the roof and is believed to have been used as a pitfall trap.
