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TANZURI
The ash-streaked cone of Ol Doinyo Lengai rising beyond the shallow soda flats and channels of Lake Natron

Landscapes

The Great Rift Valley

Escarpments, soda lakes and volcanoes along a continent slowly pulling apart.

The Rift is not a single valley but a long system of faults running from the Red Sea through East Africa. In northern Tanzania the Eastern branch is unmistakable: a sheer wall of rock above Lake Manyara, the volcanic highlands of Ngorongoro, the flat shimmer of soda lakes on the valley floor, and cones and craters wherever you look.

The lakes here are alkaline because water flows in but cannot flow out, leaving dissolved salts behind as it evaporates. Lake Natron is the most extreme of them, shallow, hot and highly caustic, and precisely because so little can live in it, it is the most important regular breeding site for lesser flamingos in East Africa. Nearby stands Ol Doinyo Lengai, at roughly 2,960 m, an active volcano known to scientists for its unusual, relatively cool carbonatite lava, which weathers to a pale grey-white on the slopes.

Far to the west, the other branch of the Rift holds Lake Tanganyika, around 1,470 m deep and one of the deepest and oldest lakes in the world. The forested mountains rising from its eastern shore — Mahale and Gombe — owe their shape to the same slow geological process.

Highlights

  • The Rift Valley escarpment above Lake Manyara, with viewpoints on the road towards Karatu
  • Lake Natron: a shallow, highly alkaline lake and an East African stronghold for breeding lesser flamingos
  • Ol Doinyo Lengai, roughly 2,960 m, an active volcano with an unusual carbonatite lava
  • The volcanic highlands and craters of Ngorongoro, Empakaai and Olmoti
  • Lake Eyasi, a seasonal soda lake set below the Eyasi escarpment
  • Lake Tanganyika in the Western Rift, one of the deepest lakes on earth
  • Waterfalls and gorges in the Engare Sero area near Lake Natron

Where to see it

Best places for this

  • The ash-streaked cone of Ol Doinyo Lengai rising beyond the shallow soda flats and channels of Lake Natron
    Lake Natron

    Northern Circuit

    The most dramatic Rift landscape in northern Tanzania: the soda lake, the volcano and the escarpments around Engare Sero.

  • A dirt safari track leading towards the shore of Lake Manyara, with the Rift Valley escarpment behind
    Lake Manyara National Park

    Northern Circuit

    The park runs along the foot of the western Rift wall, which rises several hundred metres above the lake and the forest.

  • Green crater floor and a winding lake beneath the forested, cloud-topped rim of the Ngorongoro Crater
    Ngorongoro Conservation Area

    Northern Circuit

    Volcanic highlands formed by the same rifting, including the crater itself and the smaller Empakaai and Olmoti calderas.

  • Two Hadzabe hunters walking home with their dogs across dry bush country near Lake Eyasi
    Lake Eyasi

    Northern Circuit

    A seasonal alkaline lake in a separate arm of the Rift, below the steep Eyasi escarpment.

  • The layered rock walls and dry riverbed of Olduvai (Oldupai) Gorge cutting through the plains below a big sky
    Olduvai Gorge

    Northern Circuit

    A gorge cut through layers of volcanic ash and sediment laid down by Rift volcanoes — which is exactly why its fossil record is so readable.

  • Clear shallow water over boulders on the forested shore of Lake Tanganyika, the lake that laps the Mahale Mountains
    Mahale Mountains National Park

    Western Circuit

    On the Western branch of the Rift, where forested mountains drop straight into Lake Tanganyika.

A dirt safari track leading towards the shore of Lake Manyara, with the Rift Valley escarpment behind
A flock of lesser flamingos wading and feeding in the shallows of Momella Lake, a soda lake in Arusha National Park

More to see