Pichavaram, about 15 kilometres northeast of Cuddalore near the town of Chidambaram, contains one of the world's largest mangrove forests — a dense tidal ecosystem spread across roughly 1,100 hectares of channels, islands, and mudflats. The forest is threaded with around 50 kilometres of navigable waterways, and rowboats can be hired at the Forest Department boat house to explore the channels between the mangroves.
The forest is home to numerous species of birds — herons, egrets, kingfishers, and cormorants are common — and the waterways are habitat for mudskippers, crabs, and occasional spotted deer on the mud banks. The best time to visit is early morning, when the light filters through the mangroves and the bird activity peaks. Weekends bring more visitors; arriving early helps avoid the crowds. The boat hire is straightforward and affordable; there are also larger motorboats for groups. Bring insect repellent.