The above image (via BoingBoing), by Frans Lanting was published by National Geographic about five years ago, and ever since has been fooling viewers into thinking it's a painting, rather than a photograph. The altered perspective of a telephoto lens positioning the trees against a sunset-illuminated giant sand dune is really quite startling. I had to search for a while to find a more prosaic view:
Credit Martin Heigan.
Other images here and here. The trees are sometimes described as being "petrified." I doubt whether that's technically correct; they certainly are desiccated.