The Sundarbans is a vast forest in the coastal region of the Bay of Bengal and considered one of the natural wonders of the world. Located in the delta region of Padma, Meghna and Brahmaputra river basins, this unique forest extends across Khulna, Satkhira, Bagerhat districts of Bangladesh and South 24 Parganas, North 24 Parganas districts of West Bengal, India. The Sundarbans contain the world’s largest coastal mangrove forest, with an area of about 10,000 km2 (3,900 sq mi), of which about 6,000 km2 (2,300 sq mi) are located in Bangladesh and about 4,000 km2 (1,500 sq mi) in India. The Bangladeshi and Indian parts of the Sundarbans, while in fact adjacent parts of the uninterrupted landscape, have been listed separately in the UNESCO World Heritage List: as The Sundarbans and Sundarbans National Park, respectively. The Bangladeshi part encompasses three wildlife sanctuaries, viz Sundarbans West Wildlife Sanctuary, Sundarbans South Wildlife Sanctuary and Sundarbans East Wildlife Sanctuary, and is recognized as a Ramsar site named Sundarbans Reserved Forest.