Of the 2000 or so arches in Arches National Park, Delicate Arch is the most popular, to the point where it's become the state of Utah's unofficial symbol (appearing on its license plates). Situated near Moab, Utah, these arches are formed by erosive effects of wind and water on the layered red sandstone of the region.
There's a fairly easy 1.5 mile (2.5 km) hike that takes you to the base of this 65 foot (20 m) tall arch. Most photos you see of Delicate Arch are taken near the end of that hike. This image, however, provides a less commonly seen perspective showing the arch at a distance, looking up at it sitting on this large Entrada Sandstone formation. The colors, textures, feel of it -- all are completely Utah, which has more interesting rock formations that any other place I've ever visited.