Central Kalahari Game Reserve is an extensive national park in the Kalahari desert of Botswana. Established in 1961 it covers an area of 52,800 square kilometres (20,400 sq mi) (about twice the size of Massachusetts, and 1/11 of Botswana's total land area) making it the second largest game reserve in the world.
The park contains wildlife such as South African giraffe, bush elephant, white rhino, cape buffalo, spotted hyena, brown hyena, honey badger, meerkat, yellow mongoose, warthog, South African cheetah, caracal, Cape wild dog, black-backed jackal, bat-eared fox, cape fox, African leopard, Kalahari lion, blue wildebeest, plains zebra, common eland, sable antelope, gemsbok, springbok, steenbok, impala, greater kudu, aardvark, cape ground squirrel, cape hare, cape porcupine, chacma baboon, red hartebeest and ostrich. The land is mostly flat, and gently undulating covered with bush and grasses covering the sand dunes, and areas of larger trees. Many of the river valleys are fossilized with salt pans. Four fossilized rivers meander through the reserve including Deception Valley which began to form around 16,000 years ago.