Mendip Hills to the development of cave diving in Britain. The first cave dive was attempted at Swildon's Hole in 1934, and the first successful dive was achieved the following year at Wookey Hole Caves, which has the deepest sump in Britain at 76 m (250 ft). The cave complexes at St. Dunstan's Well Catchment, Lamb Leer, and Priddy Caves have been identified as Sites of Special Scientific Interest. The deepest cave in the Mendip Hills is Charterhouse Cave with a vertical range of . Many caves in the Mendip area were excavated for archaeological and natural history studies by pioneer explorer
Caves of Kesh Gráinne as taking refuge in the caves from a vengeful Fionn. A more modern tale regarding the caves of Keshcorran can be found in a 1779 diary of Gabriel Beranger; Caves of Kesh The Caves of Kesh, also known as the Keash Caves or the Caves of Keshcorran, are a series of limestone caves located near the village of Keash, County Sligo, Ireland. The caves are situated on the west side of Keshcorran Hill (part of the Bricklieve Mountains) and consist of sixteen simple chambers, some interconnecting. The caves have been used by man over several millennia, and it has