It is the imposing seven-storied tower built by Raja Marthanda Varma in 1733 A.D, that makes it by far the most impressive landmark around the city. The Hindus have held the temple, dedicated to Lord Vishnu, sacred from antiquity.

The temple is known for it's mural paintings & stone carvings. One among the 108 sacred Vishnu temples in India. The presiding diety at this temple is Lord Vishnu reclining on Anantha serpent.

There are innumerable pillars, intricate carvings and mural paintings. Only Hindus are allowed inside and dress regulations are strictly followed. A large market, lines the street in front and the pool beside it is for ritual bathing.