Utah is T-H-E place in the world to see natural arches. While the exact number is not known, thousands of sandstone arches are thought to exist in the state. Arches are formed by the erosive effects of wind, snow, ice and rain on the relatively soft rock.
A nicely shaped arch that is easily accessible is Wilson Arch. It has a span of 91 feet (28 m), a height of 46 feet (14 m), and rests at an elevation of 6,150 feet (1,870 m).
The arch is named after Joe Wilson, a pioneer settler in the area. It is on Bureau of Land Management land, about 20 miles south of Moab. You simply pull off Highway 191 to see it.
You can hike up to the arch if you feel energetic.