- Northern Cape
- Three Sisters
One of the landmarks of the trunk road through the Karoo is the cluster of three stool-shaped hillocks known as the Three Sisters.
The trio stands at the point where the trunk road the N12 and the N1 converge. Like the Karoo's table-topped hillocks, the Three Sisters are capped with dolerite. The dolerite protects the soft sediments underneath from erosion.
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