Wookey Hole Caves then passes through major cave systems such as Swildon's Hole, Eastwater Cavern and St Cuthbert's Swallet, around Priddy, but 95% is water that has percolated directly into the limestone. The southern slopes of the Mendip Hills largely follow the flanks of an anticline, a fold in the rock that is convex upwards and has its oldest beds at its core. On the Mendips the crest of the anticline is truncated by erosion, forming a plateau. The rock strata here dip 10–15 degrees to the southwest. The outer slopes are mainly of Carboniferous Limestone, with Devonian age Old Red Sandstone exposed
Borra Caves forts. This species has short and slender musculature with large, well developed eyes. They feed on flowers and fruits, particularly jamun, guava, silk, cotton and mango. "Habrobathynella borraensis" was described from the Borra Caves. It is the first Indian cavernicolous species of the genus "Habrobathynella". The caves are located in the Ananthagiri hills range of the Araku valley of the Visakhapatnam district in Andhra Pradesh. The caves are from Bhubaneshwar in Odisha and from Hyderabad, both via National Highway 5. The caves are well connected by road, rail and air services. The nearest international airport is Visakhapatnam Airport, from Borra