National Geographic : 1916 Apr
THE RAINBOW NATURAL BRIDGE: UTAH Photograph byKolb Bros. The biggest natural bridges in the world are to be found in the United States. The largest of these,the Rainbow, 308feet high, would span the dome of the United States Capitol, with room to spare, and is nearly as high as the.Flatiron Building inNew York. Itsspan issixtimes asgreat as that of the Natural Bridge of Virginia. Utah alone has three natural bridges that are higher and ofgreater span than any other natural bridge in the world.