The Construction of this temple is similar to Tirvanadapuram and the darshan is through the three entrances. The temple is constructed in such a way that the sunrays fall on the divine face of Moolamoorthy during evenings. The Lord defeated the demon Kesi, who was creating troubles to rishis, and rested on him. Kesi's wife Asuri prayed Ganga, who along with Tamarabharani created a deluge. On finding that it had no effect, they surrendered and worshipped the Lord by splitting and going around Him and hence the name Vattaru (Vattam - Circle) as per sthala purana. The Lord is called Adikesava as He defeated the demo Adikesi. There is also a Sannadhi for Krishna here.

Approach : On the Trivandrum-Nagarcoil road one should get down at Thoduvetti and should travel further 10 kms to reach this temple. It is located on Trivandrum - Kanyakumari Rail Route. Moderate facilities are available near this temple. It is better to stay at Trivandrum and visit the temple.