Tiruvallarai: 20 kms. A small village famous for the magnificent 9th century old cave temples of Jambunathar and Pundarikaksha Perumal. In the inscriptions, the place has been named as Swethagiri. The name is derived due to the shining white outcrop of granite from the hillock. It is said that Sri Ramanujacharya came from Srirangam to this calm and quiet place to write and codify the entire arrangements of worship in Vaishnava temples. He spent a retreat of three years at the Pundarikaksha Perumal temple. The Swastika shaped Pushkarini at bottom of the hills is a unique piece of architecture.