Deadvlei is a white clay pan located near the more famous salt pan of Sossusvlei, inside the Namib-Naukluft Park in Namibia. Also written DeadVlei or Dead Vlei, its name means "dead marsh" (from English dead, and Afrikaans vlei, a lake or marsh in a valley between the dunes).
The pan also is referred to as "Dooie Vlei" which is the (presumably original) fully Afrikaans name. There are many references to the site on the Internet, its name often being translated erroneously in terms such as "dead valley"; a vlei is not a valley (which in Afrikaans is "vallei"). Nor is the site a valley; the pan is a desiccated vlei.
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"), which rest on a sandstone terrace.
It became too dry in Dead Vlei for the trees to even decompose. They simply scorched black in the sun, monuments to their own destruction. The trees, now over 1000 years old, form a barren forest. The area, however, is not entirely without life. Salsola shrubs and clumps of Nara melon stay alive by subsisting off of morning mists.
According to atlasobscura & wikipedia