Lake Bosumtwi, lake, south-central Ghana, 17 miles (27 km) southeast of Kumasi. The only true inland lake in the country, it has no surface outlet and was formed in a meteorite impact crater. With an area of 19 square miles (49 square km) and a depth of 230–240 feet (70–73 metres), the lake is fed by small streams that tumble down the crater’s steep sides (500–1,400 feet [150–425 metres] above water level). Development of tourist facilities on the lakeshore in 1976 led to the resettlement of the residents of Abonu.