The wildlife in all three reserves depends on the waters of the river to survive, and many species are specially adapted to the parched conditions such as Grevy's zebras, Somali ostriches, and gerenuks, the long-necked antelope that stand on two rear legs to reach the fresh shoots on upper tree limbs.
A top attraction in Samburu National Reserve is the Sarara Singing Wells, local watering holes where Samburu warriors sing traditional songs while hauling water for their cattle to drink.
Kenya - the name is almost synonymous with the word "safari".
Perhaps no other place on the planet conjures such a spirit of adventure and romance.
To the east of this sweeping valley, visitors can climb the snow-cloaked equatorial peaks of Mount Kenya and fish for trout in crystal clear streams.
Hell's Gate National Park harbors obsidian caves and hisses with natural geysers and hot springs.
The reserve is one of the best places in Africa to view large herds of elephants up close.