250 km (155 miles) southeast of Kgalagadi Transfrontier Park; 262 km (163 miles) northeast of Upington; 145 km (90 miles) northwest of Kuruman.
Near the Kgalagadi Transfrontier Park is the malaria-free Tswalu Kalahari Reserve, at 1,000 square km (386 square miles) the largest privately owned game reserve in Africa; it's the perfect place to photograph a gemsbok against a red dune and big blue sky. Initially founded as a conservation project by the late millionaire Stephen Boler (how he made his money is a story in itself), primarily to protect and breed the endangered desert rhino, he left it to the Oppenheimer (of De Beers diamonds fame) family in his will. Today it spreads over endless Kalahari dunes covered with tufts of golden veld and over much of the Northern Cape's Korannaberg mountain range. Its initial population of 7,000 animals has grown, and it's now home to lions, cheetahs, buffalos, giraffes, and a range of antelope species—including rare species such as roan and sable antelope, black wildebeest, and mountain zebra. For (sadly) financial reasons a fence keeps the lion and the sable antelope separate in this massive reserve. There's not as much game as in some of Mpumalanga's private reserves because the land has a lower carrying capacity (the annual rainfall is only about 9¾ inches). But when you do see the animals, the lack of vegetation makes sightings spectacular.