The Central African Lake Tanganyika is the world's longest freshwater lake. It is 677 km in length, with an average width of 50 km and a total area of 32,900 km_. It is also the world's second deepest lake, with a maximum depth of 1433 meters. It receives waters from a watershed draining Western Rwanda and Burundi, Eastern Congo-Zaire, whole Tanzania and Northern Zambia. The outlet of Tanganyika Lake is the Lukaga River, a tributary of River Zaire.