The highland terrain contributed to the creation of many caves, and deep river valleys divided the country into several mountain ranges, the highest of which are the Drakensberg Mountains.

The highest point of this range is Mount Thabana Ntlenyana (3482 m above sea level) located in Lesotho. The highest peak in South Africa is Mafadi (3,450 m above sea level), located on the border of South Africa and Lesotho, in the Drakensberg Mountains.