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Borra Caves, Araku Valley, Visakhapatnam, Andhra Pradesh, India (18.29391 83.05973)
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 800 to 1,300 m (2,600 to 4,300 ft)) of the Visakhapatnam district in Andhra Pradesh. The caves, one of the largest in the country, at an elevation of about 705 m (2,313 ft), distinctly exhibit a variety of speleothems ranging in size and irregularly shaped stalactites and stalagmites. The caves are basically karstic limestone structures extending to a depth of 80 m (260 ft), and are considered the deepest caves in India.