Angola, Botswana and Namibia are privileged to own one of the world's great natural treasures, the Cubango-Okavango River system. Rising in Angola as the Cubango, it flows to the confluence with its main tributary, the Cuito River, flowing south and then east between Namibia and Angola. It then flows on into Botswana as the Okavango River. Its waters never reach the sea, and instead spread onto the flat Kalahari sands to form a wetland of global importance - the Okavango Delta.