It was built by the Chola king Karikalan Chola around the 2nd Century AD.

Agathiyar

The northern channel is called the Kollidam, the other preserves the name of Kaveri.

It is considered as one of the oldest water-diversion or water-regulator structures in the world, which is still in use.

It still stands as a symbol of Tamil engineering.

-By Akshaya Karthik