Udayagiri Fort  which is Located about 100 kms. From Nellore. Udayagiri Fort commanding at a hight of 3079 feet. Boasts of great natural beauty. The hill side has lush vegetation and beautiful waterfalls. The ruined fort is attracting the Tourists in a big way. However, the acccess is only by steps and there is no road to the Fort. During the rule of the Gajapathis and the  Vijayanagar Rulers, this Town grew to great splendour. The ruins of 365 Temples found in the Town reflected the sculputure and archetecture of various periods. The structure on the hill such as the Ranganatha Temple reflects Chola culture, the Balakrishna Mandiram reflects Pallava culture and the Paruveta Mandapam reflects Vijayanagara Culture. Other structures include Chinna Masjid and pedda Masjid. A great
Sufi Saint belonging to the 18th Century. Rahamathulla Nayab Rasool got absorbed in the higher selfhere. Every year the Sandal Festival is celebreated on the 26th of Rabi-UI-Aval month.
           The Hill of Udayagiri is also popularly known a Sanjeevi Hills as there are so many medicinal plants on the hill. This place can be developed on par with Golconda Fort of Hyderabad. It is possible to introduce attraction like Light and Sound Show etc.,