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
Udayagiri and Khandagiri Caves hill (Udayagiri). Marshall has counted more than 35 caves in both the hills, while M.M. Ganguli has enumerated only 27 caves. The number of existing caves at Udayagiri is 18, while Khandagiri has 15. The local names of the existing caves are listed below, numbered according to the enumeration of the Archaeological Survey of India. In Udayagiri, Hathigumpha (cave 14) and Ganeshagumpha (cave 10) are especially well known due to art treasures of their sculptures and reliefs as well as due to their historical importance. "Raninka Na'ara" (Queen's Palace cave, cave 1) is also an extensively carved cave and elaborately