Explanation:

The Belum Caves festival was named as Kandanavolu Sambaralu.It was being organised to popularize the Belum caves in Kurnool district, Andhra Pradesh. Belum Caves are also known as Belum Guhalu.They are located in Kurnool district of Andhra Pradesh. They are the second-longest cave in the Indian subcontinent open to the public.The first longest is the Krem Liat Prah caves in Meghalaya. This cave system was formed over the course of tens of thousands of years by the constant flow of underground water from the now disappeared river Chitravathi. These caves are renowned for their speleothem structures.The caves also have long passages, spacious chambers, freshwater galleries and siphons. Belum caves are also indications that Jains and Buddhists monks were occupying these caves centuries ago.The presence of 4500 years old vessels from the pre-Buddhism era ensures the same.