India Chidambaram & Pichavarum, Tamil Nadu June 27, 2014 Garrett Leave a comment Aftermath of the 2004 tsunami Anyone up for a swim? When you come to a sea, get wet. On a boat in Pichavarum Estuary, looking out at the Bay of Bengal Taxis in Tamil Nadu keep their eyes wide open. I found this one unblinking in Chidambaram One of the less crowded buses. Pichavarum Mangrove Forest is the second largest mangrove forest in the world.