The Navajo Bridges are near-twins over the Colorado River’s Marble Canyon in Arizona, 464 feet high. The original bridge was completed in 1929 and is open to pedestrian and equestrian traffic, while its newer counterpart was opened in 1995 and carries U.S. Route 89A
The Manitou Incline in Colorado. A vertical wonder that gains feet in elevation in less than a mile. The Manitou Springs Incline is a popular hiking trail rising above Manitou Springs, Colorado, near Colorado Springs.