Caves of the Mendip Hills

Entrance to Swildon's Hole at Priddy, Somerset

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.[1]

  1. ^ "Fact Sheet 8: Rivers" (PDF). Cheddar caves. Archived from the original (PDF) on 22 June 2006. Retrieved 27 January 2007.