Rainbow Bridge National Monument
Rainbow Bridge National Monument, largest and one of the most perfectly arched natural bridges in the world, situated slightly north of the Arizona-Utah border in Utah's Escalante Desert. Its 278-ft (85-m) span arches 309 ft (94 m) above a deep gorge. It was made a national monument in 1916.
Additional topics
21st Century Webster's Family Encyclopedia21st Century Webster's Family Encyclopedia - Raft to Respiratory distress syndrome