Borra Caves are situated on the East Coast of India in the Anantagiri Hill range of the Araku Valley. Spread across an area of about 2 sq km, the caves are situated around 1,400 m above sea level. In 1807, the caves were discovered by William King George of the Geological Survey of India. Considered to be one of the largest caves in India, the caves have karstic limestone structures, which extend to a depth of 80 m.
A small temple inside the cave was believed to be constructed by the locals in respect to the religious incident that once happened in the region. According to the popular story narrated by the tribal people residing in this area, a cow which was grazing on the top of the caves dropped through a hole in the roof. When cowherd was searching for the cow, he came across the caves and found a stone inside the cave, which resembled a Shivalingam.
Tourists can spot number of bats and golden gecko in these caves. Mosses and brown-to-green algae are some of the popular floras seen inside these caves. The interiors of these caves are installed with sixty three lamps of mercury, sodium vapour and halogen lamps. The destination also has several mica mines; hence a project named Thalipudi Reservoir Scheme is introduced for mining precious stones like rubies.