1. Keeladi Excavation: Vaigai Valley Urban Site and Sangam Age
- Keeladi, in Sivaganga district on the Vaigai about 12 km southeast of Madurai, has yielded over 18,000 antiquities.
- Digs began in 2014 under K. Amarnath Ramakrishna.
- Carbon dating places the site between 800 BCE and the 1st century CE.
- No temples or religious structures were found.