The country is predominantly flat, tending toward gently rolling tableland. Botswana is dominated by the Kalahari Desert, which covers up to 70% of its land surface. The Okavango Delta, one of the world's largest inland deltas, is in the northwest. The Makgadikgadi Pan, a large salt pan, lies in the north.
The Limpopo River Basin, the major landform of all of southern Africa, lies partly in Botswana, with the basins of its tributaries, the Notwane, Bonwapitse, Mahalapswe, Lotsane, Motloutse and the Shashe, located in the eastern part of the country. The Notwane provides water to the capital through the Gaborone Dam. The Chobe River lies to the north, providing a boundary between Botswana and Namibia's Zambezi Region. The Chobe River meets with the Zambezi River at a place called Kazungula (meaning a small sausage tree, a point where Sebitwane and his Makololo tribe crossed the Zambezi into Zambia).
