The famous hill located in between Madanapalli – Punganur – Chowdepalli called Boyakonda, came into prominence in the recent years because of location of the famous Gangamma temple on the top of the hill. This temple attracts more than 20,000 devotees per day, mostly from Karnataka, Tamil Nadu and Andhra Pradesh. People will visit this place for praying Gangamma for getting the grievances redressed. The devotees will ask the Ammavaru for flower (Pushpam Aduguta) to know whether their vows will be fulfilled or not.

Legend has it that Goddess Durga appeared here in the form of an old woman to protect the tribes of the region and defeat the forces of a greedy Nawab. The tribal people who lived in the region were constantly harassed by the army of the Nawab. To escape from the violence, the tribal people propitiated Goddess Durga in the form of Jaganmatha.

The tribal people got the darshan of Goddess in the form of an old woman. She then took a ferocious form and annihilated the army of the Nawab. The sword used by the goddess in the battle fell on a rock atop the Boyakonda hill and it cracked. It is today worshipped as a living testimony of the divine power of Maa Durga.

A well located in the temple is famous as it holds water that cures ailments. Once a year the temple Navartri festival brings in lakhs of people from all over India, particularly the south.

Source:

https://en.wikipedia.org/wiki/Boyakonda_Gangamma

http://tourism.intirupati.com/place/boyakonda/