Tumburu Theertham is a sacred lake at Tirumala and it is deep in the jungles. It is around 6 km from Papanasam into the jungles. TTD opens a bridge that gives easy access to Tumburu Theertham on the Phalguna Purnima day (February – March). There is an interesting story that is associated with Tumburu Gandharva Tirth.
Legend has it that Tumburu Gandharva had cursed his lazy wife to become a frog and live in the lake in Tirumala. Tumburu Gandharva later repented and told his wife that she will attain her previous form when Sage Agastya will reach the spot and narrate about its holiness.
After several years, Sage Agastya reached the spot with his students. He sat below a tree in which the frog had found refuge. The Sage narrated about the holiness of the cave – it is believed that one attains moksha or liberation by bathing in the Tirth.
On hearing the words of the sage, the frog regained its previous form.
This sacred lake later came to be known as Tumburu Theertham.
You can trek to the Tumburu Theertham from Papanasam. But it is advised that you go in group as the place is frequented by wild animals.