Deadvlei is a white clay pan located near the more famous salt pan of Sossusvlei, inside the Namib-Naukluft Park in Namibia. Its name means “dead marsh” (from English dead, and Afrikaans vlei, a lake or marsh in a valley between the dunes).
Dead Vlei has been claimed to be surrounded by the highest sand dunes in the world, the highest reaching 300–400 meters (350m on average, named “Big Daddy” or “Crazy Dune.”.
Due to climate change and when a drought hit the area, and sand dunes encroached on the pan, which blocked the river from the area. The trees died, as there no longer was enough water to survive. The skeletons of the trees, which are believed to have died 600–700 years ago (ca. 1340-1430), are now black because the intense sun has scorched them.