Belum caves of Kurnool district remains unknown to most people, but if you are fascinated by caves, this is one you shouldn’t miss. At 3,229 m, it is the second-longest natural cave in India after Krem Liat Prah caves in Meghalaya. Formed by groundwater flow, these caves are rich with speleothem structures and stalagmite formations. Archaeologists have discovered a plethora of earthenware dating back to 4500 BC here. Patalganga, the subterranean stream that flows through the caves and Dhyan Mandir, a chamber of prayer relating to Jain and Buddhist monks are some of the drawing factors here. The caves are situated merely a drive away from Gandikota (the grand canyon of India). The Yaganti temple and Oravakallu Rock Garden are other major attractions to visit.