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
Cheddar, Somerset The last mill, used as a shirt factory, closed in the early 1950s. William Wilberforce saw the poor conditions of the locals when he visited Cheddar in 1789. He inspired Hannah More in her work to improve the conditions of the Mendip miners and agricultural workers. In 1801, of common land were enclosed under the Inclosure Acts. Tourism of the Cheddar gorge and caves began with the opening of the Cheddar Valley Railway in 1869. Cheddar, its surrounding villages and specifically the gorge has been subject to flooding. In the Chew Stoke flood of 1968 the flow of water washed