Cheddar Complex the Pleistocene period. Cheddar Caves contain both active and fossil systems. The active cave system is one of the most heavily studied karst systems in Britain with reference to the conduit and diffuse flow characteristics of its hydrology. Charterhouse Caves include four major swallet caves that provide an indisputable record of Pleistocene landform development in the Mendips and surrounding area. Sun Hole Cave provides a varied fauna radiocarbon-dated to the end of the Late Devensian Cold Stage. Several types of limestone including Clifton Down Limestone, Cheddar Limestone and Cheddar Oolite are visible in the Gorge and surrounding areas with pale
Borra Caves which provide views of the formations. The Araku valley, a hill station about from the Borra Caves, is also a tourist attraction for people visiting the caves. November and December are ideal months to visit the caves. Borra Caves The Borra Caves, also called "Borra Guhalu", are located on the East Coast of India, in the Ananthagiri hills of the Araku Valley (with hill ranges' elevation varying from ) of the Visakhapatnam district in Andhra Pradesh. The caves, one of the largest in the country, at an elevation of about , distinctly exhibit a variety of speleothems ranging in size