We took the 1/2 day Monument Valley Jeep Tour, and had a wonderful time. The scenery is (of course) spectactular, and our guide Bobby was just as great. He took us to all sorts of wonderful locations, and even spent some time playing a tune on his flute in one of the natural domes. The only down side was that the original vehicle for the tour had engine problems (fortunately discovered before we left), but after about a 30 minute delay they were able to swap vehicles before we left and we did not have any issues after that point.