The Organ Pipes are located near Twyfelfontein and a few kilometres to the Burnt Mountain in Damaraland, Namibia. It is a 100m long feature of unusual dolomite columns these rocks were formed by volcanic activity and after erosion, the rocks have remained in the form of organ pipes.

It is believed that the trees were swept downstream by a large flood and covered by alluvial sands. Deprived of air, the organic matter could not rot and decay, but instead, over millions of years, underwent silicification, whereby each cell is individually fossilized and the appearance, if not the colour, of wood is retained. The surrounding sands became sandstone, which is now eroding away.