36. Going-To-The-Sun Road – Glacier National Park
Although it’s not a natural formation, the Going-to-the-Sun Road is a two-lane highway constructed back in 1932 and covers the entire 50-mile width of the Glacier National Park (via Oyster). There are plenty of hiking areas and lookout points near the road to see all of the park below you. Remember that the location is only open during certain times of the year due to bad weather conditions, so plan to visit during the summer (via Oyster).