Theerthala, located in the tribal village of Prentalapalli, is famous for the temples dedicated to Lord Sangameswara and Lord Venkateswara. It is believed that around 250 years ago, Sri Bajjuri Nagaiah, an Ayurvedic doctor, arrived in the region in search of some medicinal plants and found an idol of Lord Shiva, accidentally

With the help of Pakayaji, a Brahmin, he built a temple at the site and enshrined the discovered idol. Koodali Jathara on Mahashivratri is the ancient ritual performed at the temple.