The Sundarbans are the largest continuous mangrove forests in the world, covering about 6,000 sq. km of land and water. This area is part of the world’s largest delta that is formed by the great Ganges and Brahmaputra rivers which converge in the Bengal basin. The western portion lies in India and the rest (about 60%) in Bangladesh. About one third of the total area of this forest is covered by river channels, canals and tidal creeks that vary in width from a few meters to five kilometers. The Bangladesh side of the forest is dominated by high mangroves with a climate that is tropical maritime, with lots of rain during the monsoon. During the winter it is mild and dry.

Designated as a National Park, the area is home to a wide variety of mangrove and other flora as well as many species of fish, birds and mammals. This is home to the rare and endangered Royal Bengal tiger as well as Rhesus macaques, clawless otters, leopard cats, fishing cats, and spotted deer. In the water you may be lucky enough to see river dolphins. There are fifty species of reptiles, eight species of amphibians and the only population of the estuarine or saltwater crocodile in Bangladesh.