Sundarbans

The Sundarbans is the largest single block of tidal halophytic mangrove forest in the world. The Sunderbans is a UNESCO World Heritage Site covering parts of Khulna Division of Bangladesh. 
The Sundarbans National Park is a National Park, Tiger Reserve, and a biosphere reserve. It is in the Sundarbans delta in the Indian state of West Bengal. This region is covered by mangrove forests. It is one of the largest reserves for the Bengal tiger.