The 1000th UNESCO World Heritage site is Botswana’s expansive Okavango Delta. This delta, deep in the heart of the Kalahari Basin, is fed by the Okavango River which has transported sand through its waters from Angola for centuries. The uniqueness of the Okavango Delta is that one would not expect it to exist in such a parched land, yet its waters collect with flooding from the river in January and February and rains in April and May. Hot temperatures result in evaporation of 36% of the water. All this produces varying levels of water through an area of 250 x 150 square km / 155 x 93 miles and an elaborate and extensive eco-system. Wildlife abounds here with mammals, birds, reptiles, fish and plants species each into dozens and hundreds. It is a world in and of itself, often dry and often wet. It has been declared one of the Seven Natural Wonders of Africa.