39. The Delicate Arch, Utah
The Delicate Arch can be found in the Arches National Park. This famous 52-foot freestanding natural arch is the most popular here. Take the 1.5-mile hiking trail to the famous formation and see it up close.
40. Crater Lake, Colorado
Some say stunning Crater Lake in Crater Lake National Park is one of the prettiest lakes in the world. Over 7,000 years ago an active volcano in the area erupted and then slowly collapsed on itself leaving this giant punch bowl-shaped blue lake.