Near the Fish River Canyon, about 13 kilometres north-east of Keetmanshoop lies the spectacular and much photographed Kokerboom or quiver tree forest on the farm Gariganus. The site has been declared a National Monument.

The quiver tree or "Kokerboom" is indigenous to the hot and dry southern part of Namibia. The plants are succulents and can reach a height of up to 9 metres in height. They have adapted to the extreme environmental conditions by storing water in their trunks. The tree only blossoms for the first time after 20 to 30 years and can reach 300 years of age. The wood is very light and spongy inside. And because the trunk and branches can be easily hollowed out, they were used as quivers by the bushmen (San people) who formerly inhabited this area.