The red sand is like that in a few other places in Southern Africa, including some areas of the Kalahari, the most spectacular dunes being at Sossusvlei. This 'dune', at the area just outside Piketberg is not naturally formed but is part of an excavation by Pretoria Portland Cement who have a shallow mine here. Much of the spoil is now a base for the regrowth of fynbos but the red sand seems not to support plant growth of any kind. The sand colours here vary from chrome yellow through beige to this red tan to a lovely slate blue. I stop and enjoy them for a few minutes every time I travel this road.