Utah - Rainbow Bridge National Monument

Proclaimed as national monument in 1920, Rainbow Bridge is the largest known natural bridge in the world. It is 290 ft high, 42 ft thick and 33 ft wide. The span has undoubtedly inspired people throughout time--from the neighboring American Indian tribes who consider Rainbow Bridge sacred, to the 300,000 people from around the world who visit it each year. Thanks to Fawn of USA.