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
Caves of Kesh Caves of Kesh The Caves of Kesh, also known as the Keash Caves or the Caves of Keshcorran, are a series of limestone caves located near the village of Keash, County Sligo, Ireland. The caves are situated on the west side of Keshcorran Hill (part of the Bricklieve Mountains) and consist of sixteen simple chambers, some interconnecting. The caves have been used by man over several millennia, and it has long been suggested that they were the site of ancient religious practice or gathering such as Lughnasadh. Excavations carried out in the early 20th century, particularly those by Robert Francis