Mahabalipuram and Kanchipuram are major temple in Tamilnadu

Mahabalipuram was a 7th century port city of the South Indian dynasty of the Pallavas around 60 km south from the city of Chennai. Nowadays it is still a fishing 'harbor'.
Mahabalipuram has various historic monuments built largely between the 7th and the 9th century, and is as a UNESCO World Heritage Site.

Kanchipuram is a major temple city of Tamilnadu.
Brahmin Sthapathis have shown their excellent architecture cognizance in planning the architecture and sculpting the numerous temples at Kanchipuram. Today's city is the opposite a dirty, noisy mess.