Rainbow Bridge is the largest natural bridge in the world at 290 feet (88 meters) tall and 270 feet (83 meters) across. The bridge has been formed by erosion of the sandstone by water flowing from Navajo Mountain towards the Colorado River. The bridge can be reached by a two-hour boat ride on Lake Powell from either of two marinas near Page, Arizona. It is located in one of the most rugged and remote regions of the United States, it was discovered in 1909 by an expedition that set out to find the great stone arch rumored by the Native Americans.
credit: Hansen, W.R.