Known to have the highest density of salt water (estuarine) crocodiles in India, Bhitarkanika National Park in Odisha is best toured on boats. Located along the delta of the Brahmani River which drains out to the Bay of Bengal, the sanctuary was declared a Ramsar Site in 2002. While there are regular boat tours organised along the sanctuary, very soon visitors will be able to take catamaran rides through the river network here.