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Main article: Geography of Bangladesh

A boat sailing on the Padma River, the 120 km-long seaward end of the Ganges

Saka Haphong is the country's the highest peak in Bandarban District

The Sundarbans are the world's largest mangrove forest

Bangladesh is dominated by the low-lying Ganges Delta, alongside highlands in the north and south-east. The Ganges delta is formed by the confluence of the Ganges (local name Padma or Pôdda), Brahmaputra (Jamuna or Jomuna), and Meghna rivers and their respective tributaries. The Ganges unites with the Jamuna (main channel of the Brahmaputra) and later joins the Meghna to eventually empty into the Bay of Bengal. The alluvial soil deposited by these rivers has created some of the most fertile plains in the world. Bangladesh has 57 trans-boundary rivers, making water issues politically complicated to resolve – in most cases as the lower riparian state to India.^[34]
Most parts of Bangladesh are less than 12 m (39.4 ft) above the sea level, and it is believed that about 10% of the land would be flooded if the sea level were to rise by 1 m (3.28 ft).^[35]
Sylhet Division, Chittagong Division and parts of Rangpur Division, Mymensingh District and Gazipur District feature topographically hilly areas, which are part of various regional mountain ranges and highland formations, including the Garo, Khasi and Tripura Hills, the Bhawal highlands, the Chittagong Hill Tracts and the Arakan mountains.
In southeast Bangladesh, experiments have been done since the 1960s to 'build with nature'. By implementing cross dams, the natural accretion of silt has created new land. With Dutch funding, the Bangladeshi government began to help develop this new land in the late 1970s. The effort has since become a multiagency operation building roads, culverts, embankments, cyclone shelters, toilets and ponds, as well as distributing land to settlers. By fall 2010, the program will have allotted some 27,000 acres (10,927 ha) to 21,000 families.^[36]

The highest peak in Bangladesh is Saka Haphong in Mowdok range at 1,052 m (3,451 ft) in the Chittagong Hill Tracts to the southeast of the country.^[