The point of going to Flagstaff was as a base to visit the Grand Canyon, which was awesome! We went on a tour with the hostel, and stopped at various points around the canyon to admire the view, which was very impressive. Its just so big, not really just one canyon but loads of them interlinking, so deep you can't see the bottom, and so wide you can't make out any detail on the other side. We did a short hike part of the way down into the canyon, which was a lot of fun except for the fact that the path that had seemed very easy to walk on the way down, became a rather tiring effort on the way back up! Californian Condors and massive ravens circled round overhead all day, and thunderstorms rattled around overhead, it was a very atmospheric, unforgettable experience.