 There are many deposits of alluvial diamonds along the Orange River and legend has it that the biggest cache of diamonds in the world lies in the swirl-hole eroded into the granite at the foot of the waterfall by the thundering waters.The most characteristic plant in the park is the giant tree aloe ("Aloidendron dichotomum") known locally as the quiver tree or "kokerboom".It is perfectly adapted to the dry semi-desert rocky areas found in the Nama-Karoo, able to withstand the extreme temperatures and the infertile soil.