The Richtersveld occupies the northwestern corner of South Africa's Northern Cape, a desert landscape of rugged kloofs and sharp volcanic mountains that ranges from sea level to 1,377 meters at Cornellberg. Summer temperatures have been recorded at approximately 53 degrees Celsius -- among the highest anywhere on the continent. Rainfall varies wildly, from 5 millimeters per year in the eastern sections to 200 millimeters in the western mountains. The Orange River, lush and green, forms the northern border with Namibia, creating an almost hallucinatory contrast with the baked rock on either side. Despite these extremes, the Richtersveld is recognized as the only arid biodiversity hotspot on earth, and the majority of the area is inscribed on UNESCO's World Heritage List -- not for its natural features, but for its cultural values.

The UNESCO designation honors something rare in the modern world: a community that still lives the way its ancestors did. The Nama people practice transhumance in the Richtersveld, migrating seasonally with their livestock through a fragile succulent ecosystem. They claimed title to their traditional land and established a community conservancy that they manage alongside the national park. The northern section was proclaimed in 1991, after 18 years of negotiations between the National Parks Board and the local Nama, who insisted on their right to continue living and grazing in the area. The conservancy covers 1,624 square kilometers. It is the last place where the traditional way of life of the Khoikhoi -- of whom the Nama are the largest surviving clan, a people who once occupied the entire southwestern part of Africa -- persists to any significant degree.

Life in the Richtersveld depends on moisture that never falls as rain. Early morning fog rolls in from the Atlantic, carried by the cold Benguela Current, and the locals have a name for it: Ihuries, or Malmokkies. This fog makes survival possible for a range of small reptiles, birds, and mammals that could not otherwise exist in such an arid place. Nights are cool even when days are scorching, and heavy dew supplements what little precipitation arrives. In winter, gale-force winds sweep in from the ocean, cold and sand-laden, scouring the landscape. The Richtersveld is a transitional zone between the Succulent Karoo in the west and the drier Nama Karoo to the east, and its climate reflects that in-between status -- never quite predictable, never quite hospitable, but always just sufficient for life to find a way.

Approximately 4,849 plant species have been documented in the Richtersveld, 40 percent of them endemic. Three species of the tree aloe Aloidendron are found here: A. dichotomum, A. pillansii, and A. ramosissimum, known locally as kokerbooms or quiver trees because their hollowed branches served as arrow quivers. The animal life is equally diverse. Hartmann's mountain zebras navigate the rocky slopes alongside klipspringers, duikers, and grey rhebok. Chacma baboons and vervet monkeys inhabit the kloofs. African leopards and caracals are present but rarely seen. The threatened Richtersveld katydid, Africariola longicauda, exists nowhere else. Puff adders, black spitting cobras, and Nama tiger snakes occupy the reptile niches, while weaver birds, doves, and guineafowl fill the skies -- especially during the wetter winter months when species diversity spikes.

In June 2007, the Richtersveld Cultural and Botanical Landscape, just south of the national park, was named a UNESCO World Heritage Site. Unlike the national park, the community conservancy that forms the core of the World Heritage Site is not subject to diamond mining, making it the more pristine of the two protected areas. This distinction matters. The Nama community owns the entire area and manages it -- the national park in conjunction with South African National Parks, the World Heritage Site entirely on their own. The inscription recognizes that the cultural values of the community and their continued existence are inseparable from the environment. Protect one, and you protect the other. Lose one, and the other becomes a museum piece.