Flagstaff, Arizona

Flagstaff, Arizona is on this list precisely because of its proximity to the Grand Canyon. For anyone choosing to take a trip to the United States, seeing this geological marvel is inspiring on so many levels. Because of its vastness, as well as the number of days you have to check it out, choosing exactly how you plan to get through a big portion of the canyon surely takes planning, but the skywalk is one of the most amazing ways to get an idea of just how awe-inspiring it is. And once you’ve had enough of the canyon, you may even want to make a stop at Flagstaff’s Lowell Observatory, one that has NASA as part of it’s history.