Tiruvallur is a temple town and Grade I municipality in Tiruvallur district in the Indian state of Tamil Nadu. It is located on the Cooum river about 42 km (26 mi) northwest of the city of Chennai (Madras), the capital city of Tamil Nadu. It is the administrative headquarters of Tiruvallur district. This town consists of four revenue villages namely Thiruvallur, Periakuppam, Perumpakkam and Pungathur. The town is divided into 27 wards. It is well known because of the Veera Raghavar temple which is one of the 108 sacred shrines of Vaishnavites. There is a pond nearby this temple, where the tank festival is held. There is a Siva temple near this shrine which is also quite popular among the locals. There is also a 40 feet tall Viswaroopa Panchamukha Hanuman temple, where the murti is made of a single green granite stone. Poondi reservoir from where drinking water is drawn to Chennai city is at about 9 km (5.6 mi) from this town.