Sri Vaikuntanathar Temple is a Lord Vishnu temple, also a part of Navathirupathi temple in Thoothukudi in Tamil Nadu. It is one of the 108 divya desams where Lord Vishnu was worshipped by Nammalwar.
The temple is also a navagraha sthalam for Surya.

108 Divya Desam
This temple is one of the important Divya Desam in this earth known as Bhuloka Vaikuntam- abode of Vishnu on earth. Various Alwars have composed poems on Lord Vishnu – 6500 years back according to legends. Their composition of poems on Lord Vishnu temples all over India is known as Divya Prabandham which was compiled in 9th century.