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The caves get their name from a formation inside the caves that looks like the human brain, which in the local language, Telugu, is known as borra. The river Gosthani flows right beside the caves. The caves extend into the ground so much so, that the river can be heard flowing above from inside the caves. The landscape around the cave is wild and mountainous. The geology is complicated and the limestone where the cave is located is surrounded by mica. Several mines in this mica are prospected for precious stones like rubies.

The legend of the discovery of the caves is quite popular. According to this legend, a cow, grazing on the top of the caves, fell down 60 metres, through a hole in the roof and the cowherd came across the caves while searching for the cow. There is also a stalagmite inside the cave that resembles a Lingam, and many people flock to the cave to get a glimpse of it.