We took the Monument Valley and Mystery Valley tour with Navajo Spirit Tours, and our Navajo Spririt Guide, Larry was wonderful. He is a traditional medicine man, so he was able to giv eus lots of interesting information on the local plants and their uses in curing ailments. The tour was excellent, and he also gave us lots of history and stories from the past. We got to see the ancient cliff dwellings and petroglyphs, none of which you'd see if you simply did the 17 mile drive yourself. We also say beautiful sandstone arches and had lots of time for taking photographs. I highly recommend this tour, it was fantastic!