The Lake Eyasi is a seasonal shallow salt lake on the floor of the Great Rift Valley.

The Hadzabe bushmen live in this region, as do the Datoga and Mbulu tribes. A visit with the bushmen is worthwhile and they will graciously show you where and how they live and hunt. They subsist entirely off the bush and by bow hunting. Everything they use is made from local materials, including their bows which are strung with giraffe tendon and their arrows which are coated in lethal poison. Their language resembles that of Kalahari bushmen tribe clicking noises used.
The Datoga and Mbulu people are pastoralists, like the Masai people.

Lake Eyasi’s water levels vary greatly between the rainy and dry seasons. During the dry season animals are forced to share what water is left, which makes for easier wildlife viewing. The lake can get quite deep during the rainy season and it attracts hippos who like to cool off in its brackish waters. 

Bird lovers will be in paradise here, as the lake attracts vast numbers of birds of all sizes and colors. Some main birds to be found here include: Africa spoonbill, flamingos, gray headed gulls, great white pelicans, pied avocet and yellow-billed storks. The main fish found in the lake are catfish and lungfish.
Source: http://en.wikipedia.org/wiki/Lake_Eyasi