Wookey Hole Caves then passes through major cave systems such as Swildon's Hole, Eastwater Cavern and St Cuthbert's Swallet, around Priddy, but 95% is water that has percolated directly into the limestone. The southern slopes of the Mendip Hills largely follow the flanks of an anticline, a fold in the rock that is convex upwards and has its oldest beds at its core. On the Mendips the crest of the anticline is truncated by erosion, forming a plateau. The rock strata here dip 10–15 degrees to the southwest. The outer slopes are mainly of Carboniferous Limestone, with Devonian age Old Red Sandstone exposed
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