Looking east; the other (east) bridge is hidden behind this one. The Gemini Bridges are a twinned set of arches on BLM (Bureau of Land Management) land near Moab, Utah, accessed by a rough dirt road (high clearance mandatory and 4WD desirable!) Because they're not in a national park, the regulations aren't so stringent, and not only is it perfectly safe to stand on the arches, it's perfectly legal (left inset). I would have liked to get a picture standing on the arch from here, but I was by myself and my remote release isn't _nearly_ long enough ;) I suppose if I'd had a radio-controlled one-- The middle inset shows the overhanging ledge I'm standing on to get this picture, and the right inset shows the gap between the arches. I don't have a picture like this of the east arch because it would require being on the far side of the canyon, and I had no time for such a sidetrip! The arches are in the Jurassic Wingate Sandstone, according to Doelling et al.'s map (Utah Geological Survey, Map 155, 1994).
Unfortunately, there have been a number of Darwin Awards from idiots attempting to jump between the arches.