I am interested in a tour of Monument Valley. In looking at some tour offerings, I see that some tours are full day, half day, 3.5 hrs, 2.5 hrs, morning and sunrise tours, etc. Unfortunately, my time is somewhat limited, but I am adjusting my itinerary to allow for more time here. I think I am mostly interested in seeing the highlights of the Monument Valley area. But, what exactly are the "highlights" that I should see, so that when I speak to a tour guide when booking a reservation, I can ask to make sure that the tour I select includes these "must see" sights or attractions? Thank you.