Spooky canyon

I'm taking off at this moment on my journey toward the spooky Southwestern canyon full of Fremont-era granaries, petroglyphs, pictograms and other remarkably intact ruins (they found actual corncobs in in some of the granaries!). The place was inhabited about a thousand years ago but the people deserted it quickly for mysterious reasons. The other strange thing is the fact that they built their shelters so far up on the rocks, out of reach from water on semi-vertical cliffs. In fact, you would need to be a fairly skilled rock climber just to reach many of the cliff dwellings in this place.