The Namib-Naukluft Park is a national park in western Namibia, situated between the coast of the Atlantic Ocean and the edge of the Great Escarpment. It encompasses part of the Namib Desert (considered the world's oldest desert), the Naukluft mountain range, and the lagoon at Sandwich Harbour. The best known area of the park and one of the main visitor attractions in Namibia is Sossusvlei, a clay pan surrounded by sand dunes, and Sesriem, a small canyon of the Tsauchab.