The country's longest river is the Nyabarongo. The Nyabarongo-Kagera eventually drains into Lake Victoria. Rwanda has many lakes, the largest being Lake Kivu. It is one of the twenty deepest lakes in the world. Other sizeable lakes include Burera, Ruhondo, Muhazi, Rweru, and Ihema. Ihema is the largest of a string of lakes in the eastern plains of Akagera National Park.