Which lake is the world's second-deepest freshwater lake?

Lake Tanganyika is the world's second-deepest freshwater lake.

Its maximum depth is about 1,470 metres, surpassed only by Lake Baikal. Tanganyika is also the world's second-largest freshwater lake by volume and the second-largest by surface area, although Lake Superior is larger by surface area.

The lake lies in the Albertine Rift and is shared by Tanzania, the Democratic Republic of the Congo, Burundi, and Zambia. Its long, narrow basin is divided into deep sub-basins formed by tectonic activity. The lake is more than 600 kilometres long but comparatively narrow.

Tanganyika's age and isolation have allowed many fish species to evolve there, especially cichlids. It drains through the Lukuga River into the Congo River system. Lake Malawi is another major African rift lake, but it is shallower and smaller than Tanganyika.