Botswana and 30°E. 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, Mahalapye, Lotsane, Motloutse and the Shashe, located in the eastern part of the country. The Notwane provides water to the capital through
High Desert (California) the following regions: Other parts of the San Bernardino County portion include the northeastern reaches of the High Desert, where the Fort Irwin National Training Center and the Searles Valley are located, and the far eastern edge of the state where places like Needles and Earp are located along the Colorado River. San Bernardino County's portion of the High Desert region contains the most land mass of the four involved counties, making up approximately 70% of the total county's area. The major metropolitan centers in the region are primarily centered on the cities of Lancaster and Victorville. Lancaster, the largest