Clouds Around the Okavango Swamp, Botswana19.2S 22.7E
The Okavango River runs southeastward for 1,000 miles (1,600 km) from central Angola to the Kalahari (desert) in northern Botswana. Here, the river spills its waters onto the Kalahari, creating a huge inland delta called the Okavango Swamp.
The marshes of the Okavango Swamp, east of the Kalahari desert in Botswana are perhaps the best example of marshes formed in an interior, closed basin that has no drainage. Other basins without outlets like that of the Great Salt Lake in Utah have accumulated too much salt for marsh growth.