Lake Assal (French: Lac Assal) is a crater lake in central Djibouti, located at the southern border of Tadjoura Region, touching Dikhil Region, some 120 km (75 mi) west of Djibouti city. It lies 155 m (509 ft) below sea level in the Afar Depression and its shores comprise the lowest point on land in Africa and the second lowest land depression on Earth after the Dead Sea. It measures 19 by 7 km (4.3 mi) and has an area of 54 km2 (21 sq mi). The maximum depth is 40 m (130 ft), whereas the mean depth is 7.4 m (24 ft), which makes for a water volume of 400 million cubic meters (320,000 acre·ft). The catchment area measures 900 km2 (350 sq mi), and there is just a residual runoff of fresh water into the lake.