My wife and I recently went to Monument Valley. It's located just north of the AZ border. Going north on 163, you turn east on I believe Monument Valley road. A few miles down you will run into the Navajo museum. There are 1 1/2 hr and 2 1/2 hr tours of the valley on rough dirt roads. I chose to let them escort us on the tour but if you have a truck or suv or maybe a trike, you can check it out yourself at no extra charge. The old movie director John Ford filmed many John Wayne western movies in Monument Valley. My wife was in a hurry to get to Vegas and didn't even want to go to Monument Valley but afterwards, she said that was the best part of the trip.