The Royal Gorge, near Canon City Colorado, is a narrow canyon that is up to 1250 feet deep at some points. The Arkansas River spent 3 million years cutting the canyon as the Rockys were pushing up nearby. The Royal Gorge Railway runs several daily excursions thru the Gorge to view the canyon up close. About 100 years ago, a suspension bridge was built over the gorge which, at almost 1000 feet high, is one of the world’s highest suspension bridges. The park here at the bridge also has a cable car that crosses the gorge as well as a zipline. A third way to see the Gorge is via the Tunnel Trail. A short but steep hike up the trailhead leads to three tunnels that will let you walk along the cliffside.