Munoor, a small village between Dindivanam and Marakkanam, situated off the East Coast Road, is home to a Vishnu temple dedicated to Arulala Perumal. The main sanctum has a small stone image of Arulala Perumal flanked by Sri Devi and Bhu Devi. Although modifications in recent times have obscured some of the vestiges of ancient eras, the mandapa in front of the garbha-griha still has pillars of the Chola era. The Garuda enshrined in a small sanctum immediately in front of this mandapa has nine serpents clearly seen on his body.
There are shrines for Andal, Yoga Narasimha and Goddess Lakshmi, worshipped here as Perundevi Thayar. The stone image of Yoga Narasimha is unique as it does not have the protruding teeth usually seen in images of this deity. It was discovered in the premises and later consecrated. The Hanuman worshipped here is a rare one. Stone sculptures of this deity are usually made with the crown (kiritam). Here, the image is without a crown and the one that is seen now is made of silver.
There are many stone inscriptions here, one of which is dated 1464 A.D. The same epigraph is seen etched in the Shiva temple in Munoor as well. It belongs to the reign of King Kapilendra Deva or Kapileshvara of the Gajapati dynasty of Orissa (Kalinga). It mentions a gift of land for a festival and repairs to the Shiva and Vishnu temples in Munoor. Other donative epigraphs are also inscribed here.