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
Caves of Namibia Caves of Namibia Namibia, a country in south-western Africa, has a total of 124 known caves, 41 of which are situated in the Otjozondjupa Region. In several of these caves research has been done and published in various journals, but of a variety of caves the location is not commonly known, as the information got lost over the years. Some locations are also deliberately kept secret to protect the caves. The caves known to local people were reported by early explorers and travelers. The caves of Namibia are not reported for their beauty, but for their practical and curiosity reasons.