Mannargudi is a temple town in the Cauvery Delta, 45 km from Kumbakonam, built around the Rajagopalaswamy Temple — a large Vishnu temple with a 60-metre gopuram and a significant tank, the Haridra Nadhi. The temple is one of the larger Vaishnavite pilgrimage centres in Tamil Nadu and is active year-round. The annual Brahmotsavam festival in the Tamil month of Panguni (March-April) draws large crowds.
The town sits near Thiruparkadal Lake, a shallow freshwater lake known for fishing and migratory birds. Outside the temple pilgrimage circuit, Mannargudi sees relatively few visitors and retains the quiet, unhurried character of delta towns before tourism found them.