The Rift Valley is the dominant geological feature of Kenya. The Valley is huge, running from Ethiopia, through Lake Turkana, the Cherangani Hills, and down past the plains of the Masai Mara, into Tanzania. The Rift Valley is famous for its soda lakes, such as Lake Nakuru and Lake Bogoria.
The first encounter with the Rift Valley experienced by most travelers is the incredible view from the highway running from Nairobi to Nakuru.
Nakuru and Eldoret are the biggest towns in the valley and they are the best bases from which to explore it.