Caves of the Mendip Hills caves are listed below Caves of the Mendip Hills The caves of the Mendip Hills are formed by the particular geology of the Mendip Hills: large areas of limestone worn away by water makes it a national centre for caving. The hills conceal the largest underground river system in Britain. The hills consist of anticlines of Carboniferous Limestone lying over Devonian Old Red Sandstone, with the sandstone exposed on the summits. When a surface stream running off the sandstone reaches the limestone it sinks below ground through a "swallet", (also known locally as a "slocker"), continuing on its way down
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