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
Ellora Caves caves at the site, all excavated from the basalt cliffs in the Charanandri Hills, 34 of which are open to public. These consist of 12 Buddhist (caves 1–12), 17 Hindu (caves 13–29) and 5 Jain (caves 30–34) caves, with each group representing deities and mythologies that were prevalent in the 1st millennium CE, as well as monasteries of each respective religion. They were built in proximity to one another and illustrate the religious harmony that existed in ancient India. All of the Ellora monuments were built during Hindu dynasties such as the Rashtrakuta dynasty, which constructed part of the Hindu