Quiver Trees, Namibia

The Afrikaners called the trees kokerboom, but because their fibrous, pulpy trunks are easy to hollow out and were once widely used as quivers for arrows for bushmen, they are known as quiver trees.

The trees are naturally found in only this one relatively small part of Africa, and typically grow alone, like curiously-formed sentinels guarding the landscape. There are fewer than two hundred of them left in the world.