The divya kshetram -TIRUNAAGAI is a beautiful temple located in Nagapattinam town in Tamil Nadu. The presiding deity is Neelamegha perumal in a standing posture. There are also shrines for Govindaraja Perumal sitting posture and Ranganathar in reclining posture. The Goddess is Soundaryavalli. The sacred water is sarapushkarani and the sanctum sanctorum is soundarya vimanam.
In this temple there is a rare image of Ashtabhuja Narasimhar with one hand blessing prahlada with Abhaya hasta and the rest destroying Hiranyakasipu.
Sthala purana says that this temple has come into existence when the Lord gave darshan to Dhurva. In the Brahmaanda purana it is said that teh local princess due to a curse had a third breast, and she was informed that it would disappear upon her sighting her groom to be. The princess sighted Nagaraja offering prayers to Lord Vishnu at this place and was relieved of her curse. Lord vishnu appeared before them in the the three different postures,- standing, sitting and reclining - as seen in the temple blessed them and celebrated their marriage. The sthala vriksham in this temple is mango tree.