Sundarban is the world’s largest mangrove forest. It is one of the beautiful natural wonders of the whole world and world heritage site recognized by UNESCO in 1997. The Sundarban is an extensive forest along with the coastal region of the Bay of Bengal in Bangladesh and India. It is related to Padma, Meghna and Brahmaputra river basins of Beautiful Bangladesh. The area of this forest extends across Khulna, Satkhira, and Bagerhat districts of Bangladesh.