A coastal desert, the Namib is one of the oldest deserts on earth. Located in the southern part of the Namib Desert in the Namib-Naukluft National Park, lies Sossusvlei, a salt and clay pan, famous for its spectacular sand dunes. Towering above the stark white pan, these immense sand dunes contrast and exhibit ever-changing hues of red, pink or orange depending on the time of day between sunrise and sunset. They are among the tallest dunes on earth with the largest standing over 300 metres above the surrounding plains. The highest dunes are partially covered with rich vegetation, which is seasonally fed by underground rivers and moisture brought across from the Atlantic Ocean fog. Traces in the sand, left by insects and other small animals can often be seen. The wildlife here consists of animals that are desert adapted and are able to survive on very little water.