Tyning's Barrow Swallet

Tyning's Barrow Swallet is a cave between Charterhouse and Shipham in the limestone of the Mendip Hills, in Somerset, England. The cave is close to GB Cave and also to Charterhouse Cave, the deepest cave in the region.

Tyning's Barrow Swallet is 1.29 km in length and reaches a depth of 132 m.

Access
The entrance is kept locked, and the key is available from the nearby farmhouse on payment of small goodwill fee.