Do something quite unique on your travels in the desert near Duqm. Beneath the sands lie thousands of fossilized trees, transformed over millions of years into amazing colors like you've never seen before. Petrified wood is fossilized material that is typically formed when plant material is buried by sediment and protected from decay by oxygen and organisms. Groundwater rich in dissolved solids then flows through the sediment replacing the original plant material with silica, calcite, pyrite or another inorganic material such as opal. Hunt for these amazing specimens for photographs and to inspect them but please don't take any of these natural geological wonders away with you to preserve this experience for everyone else visiting the area.