At sunrise - Best in winter (May to September)
These are the highest dunes in the world. From the entrance of the park, it is a 60 km drive on a paved road to Sossusvlei. The best light is in the morning and it's less crowded. The park opens the gate at sunrise. You should be the first in the line and drive straight to Deadvlei to get the best pictures.
Pictures provided by Chris