Lake Nyasa | Encyclopedia.com

Malawi, Lake (formerly Lake Nyasa) Lake in the Great Rift Valley of e central Africa, bordered by Tanzania (n), Mozambique (e) and Malawi (s and w). First sighted by the explorer Caspar Boccaro in 1616, the lake was visited by David Livingstone in 1859. The third-largest lake in Africa, it is fed chiefly by the River Ruhuhu and drained by the Shire.