Theertha Thotti is around 19 km from Theni and just 2 km from Periyakulam. It falls on the road to Bodinayakkanur from Theni on the Madurai– Kochi National Highway. It is a popular pilgrimage centre as the Lord Subramaniar Temple is situated there. This temple is around 1000 years old. Theertha Thotti means sacred water tub. It is a natural spring surrounded by neem and bright trees.
Amist these trees is a tank called Theertha Thotti. This tank is a natural spring that has never gone dry and is considered holy. The tank has an inner mandapam and a staircase that goes down. The walls of the Theertha Thotti are engraved with figurines of Saptha Kannikas or the seven virgins worshipping Lord Murugan and Vinayaka.