Caves of the Mendip Hills then rising up a fracture in the rock. Few caves on the Mendip Hills are more than deep or a few kilometres in length, (with some notable exceptions, such as Swildon's Hole which is over long), but a number are complex with several levels of passages which have been abandoned by the water, for example those around Cheddar. The catchment area of the Cheddar Yeo, which rises in Gough's Cave, measures . Dye marking shows that some of the water travels underground for up to , taking up to 14 days to reach Cheddar. When Banwell Bone Cave was discovered
Caves of the Tullybrack and Belmore hills Caves of the Tullybrack and Belmore hills The Caves of the Tullybrack and Belmore hills can be found in south-west County Fermanagh, Northern Ireland. The region is also described as the West Fermanagh Scarplands by environmental agencies and shares many similar karst features with the nearby Marble Arch Caves Global Geopark. The caves are situated under the hills of Tullybrack () – which incorporates Glenkeel () and Knockmore () – and Belmore () and feature three major cave systems: Reyfad–Glenkeel, Noon's Hole–Arch Cave and Boho Caves. They have been described as nationally significant by the Northern Ireland Environment Agency. The