The Namib is a coastal desert in southern Africa that stretches for more than 2,000 kilometers along the Atlantic coasts of Angola, Namibia, and South Africa. It is believed to be the oldest desert in the world, having endured arid or semi-arid conditions for at least 55 million years. One of its most iconic features is Sossusvlei, where some of the world's highest and most vividly colored sand dunes can be found, appearing bright orange due to the high concentration of iron oxide. Because it meets the cold Atlantic Ocean, the desert often experiences thick fogs for over 180 days a year. This fog is the primary source of moisture for much of the desert's unique life, such as the Welwitschia mirabilis, a plant that can live for over 1,000 years, and the 'fog-basking' beetles that collect water on their backs from the morning mist. The area where the dunes meet the ocean is famously known as the Skeleton Coast.