Chittagong lies at . It straddles the coastal foothills of the Chittagong Hill Tracts in southeastern Bangladesh. The Karnaphuli River runs along the southern banks of the city, including its central business district. The river enters the Bay of Bengal in an estuary located west of downtown Chittagong. Mount Sitakunda is the highest peak in Chittagong District, with an elevation of . Within the city itself, the highest peak is Batali Hill at . Chittagong has many lakes that were created under Mughal rule. In 1924, an engineering team of the Assam Bengal Railway established the Foy's Lake.