Tyning's Barrow Swallet

Tyning's Barrow Swallet (grid reference ST47135638) 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 (4, 200 ft) in length and reaches a depth of 132 m (433 ft).

Cave data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).