Naguleswaram Temple is one of the oldest shrines in the area, supposedly built in the 7th century. Historically known as Thirutambaleswaram Kovil of Keerimalai, it is one of the five Pancha Ishwarams dedicated to the mighty God Shiva. The kovil underwent severe destruction and re-construction during the period, and was finally re-opened in 2012, after nearly 20 years of major renovation.
As per folklore, the legendary sage Nagula Muni, who was cursed with a face resembling a mongoose, was cured once he bathed in the Keerimalai Springs. He built Naguleswaram Kovil as a gratitude.
At present, thousands of devotees assemble during the most famous festival, Aadi Amaavaasi, which is held in the Tamil month of Aadi (mid-July to mid-August). The rituals are conducted by men to pay homage to their forefathers. Visitors are required to dress modestly and uphold decorum and respect when entering the kovil.