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
Wookey Hole Caves the historic machinery. Visitors to the site are still able to watch a short video of the paper being made from cotton. Other attractions include the dinosaur valley, a small museum about the cave and cave diving, a theatre with circus shows, a house of mirrors and penny arcades. In 1956, Olive Hodgkinson, a cave guide whose husband's family owned the caves for over 500 years, was a contestant on "What's My Line?" The cave and mill were joined, after purchase, by Madame Tussauds in 1973 and operated together as a tourist attraction until there was a management team buyout