Navajo Bridge & Interpretive Center

Twin steel arches — one historic, one modern — span Marble Canyon 142 meters above the Colorado River, and the 1929 original is now a pedestrian walkway with vertigo-grade views. This is one of the most reliable places in America to spot endangered California condors, which roost on the girders below; a small interpretive center and Navajo artisan stalls flank the crossing.