Namibia Kalahari Desert, an arid region that extends into South Africa and Botswana, is one of Namibia's well-known geographical features. The Kalahari, while popularly known as a desert, has a variety of localised environments, including some verdant and technically non-desert areas. The Succulent Karoo is home to over 5,000 species of plants, nearly half of them endemic; approximately 10 percent of the world's succulents are found in the Karoo. The reason behind this high productivity and endemism may be the relatively stable nature of precipitation. Namibia's Coastal Desert is one of the oldest deserts in the world. Its sand dunes, created
Libyan Desert area of . most of which is desert save for a narrow coastal strip to the north on the shore of the Mediterranean, and the mountains of Cyrenaica (the Jebel Akhdar, or "Green Mountains"). The desert covers an area of approximately , and extends approximately 1,100 km from east to west, and 1,000 km from north to south, in about the shape of a rectangle slanting to the south-east. Like most of the Sahara, this desert is primarily sand and hamada or stony plain. Sand plains, dunes, ridges, and some depressions (basins) typify the endorheic region, with no rivers draining