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
Elephanta Caves in the rock-cut architectural style. The caves are hewn from solid basalt rock. The larger group of caves, which consists of five caves on the western hill of the island, is well known for its Hindu sculptures. The primary cave, numbered as Cave 1, is about up a hillside, facing the Mumbai harbour. Caves 2 through 5 are next to Cave 1 further southeast, arranged in a row. Cave 6 and 7 are about northeast of Cave 1 and 2, but geologically on the edge of the eastern hill. The two hills are connected by a walkway. The eastern hill