The rock- cave temple Kalyana Venkattaramasami Temple, popularly known as Then (South) Tirupati is situated at Thanthoni, around 5 km from Karur. The shrine placed on a raised portion of a hillock is one of the famous temples in the district. Lord Kalyana Venkataramana Swamy ( Lord Srinivasa) is the main deity with the Goddesses Sri Devi and Bhoomi Devi. 

The main festivals celebrated here are Deepam festival in the month of September- October, the 22 days long Purattasi festival and the famous Masi Maha car festival.