Caves of the Mendip Hills 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 towards sea level by
Wookey Hole Caves of the witch that prompted TV's "Most Haunted" team to visit Wookey Hole Caves and Mill to explore the location in depth, searching for evidence of paranormal activity. The show, which aired on 10 March 2009, was the last episode transmitted in series 11 of the show's run on the satellite and cable TV channel Living. In 2009 a new actor to play the 'witch' was chosen by Wookey Hole Ltd amid much media interest. Carole Bohanan in the role of Carla Calamity was selected ahead of over 3,000 other applicants. The cave was first opened to the public by