We did a tour of the Cliff Palace and checked out Spruce Tree House and the Balcony. Fascinating to think that this civilization was so much more advanced than anything else in North America at this time (circa 12th and 13th centuries). Perhaps even more incredible was how difficult it is to access these communities. They are way up high in the canyon walls, with death-defying access paths on the vertical cliff faces. Wow. Adding to the amazement was the mystery of why everyone just up and left after only a couple hundred years living in these cliff dwellings. They put so much work into establishing these places, then over what was apparently only a few decades they all left. Huh? It was also cool to see how the civilization developed on the mesa tops prior to moving to the cliffs. They have archeological digs of various settlements ranging in date from 700 AD to 1100 AD, around they time they starting moving to the cliffs. I can't imagine spending a long bitter winter trapped on the side of the cliff, let along raising a small child or children in such a small space. Certainly a vastly difference experience to the modern world.