Navajo Bridge

The ferry that carried settlers across the Colorado River here sank in 1928, killing three people, and for months afterward the only alternative was an 800-mile detour. The bridge that ended that — a steel arch span opening January 12, 1929 — was, at the time, the highest steel arch bridge in the world. The original span now carries foot traffic 467 feet above the river; California condors, reintroduced to the area in 1996, roost on the girders beneath both bridges.