Natural Bridges National Monument, Utah
The sign at the trailhead says:
Trail to bridge: .6 mile (.97 km) – 500 foot (152 m) elevation change.
A strenuous hike rewards the adventurous with a closer view of Sipapu Bridge. The trail leads to either a viewpoint partway down the canyon wall or to the canyon bottom where you can stand beneath one of the world’s largest natural bridges.
The trail contains two flights of stairs, three ladders, steep switchbacks, exposed bare rock, and stretches requiring the use of handrails.