Road Trips Gateway Towns 7 Stops in Phenomenal Flagstaff, Arizona “Clark-Telescope-Dome_FlickrLowellObservatory_680” "Lowell Observatory via Flickr" Share this Facebook Icon Twitter Icon Email Icon Join Grand Canyon National Park Trips Create a personalized feed and bookmark your favorites. Join for free Already have an account? Sign In Join Grand Canyon National Park Trips Create a personalized feed and bookmark your favorites. Join for free Already have an account? Sign In