White House Ruins, Canyon de Chelly, Arizona. Parts of the Canyon have been continuously inhabited for 800+ years. It is also sprinkled with ruins of the Ancestral Puebloans, like this one (called "White House because the dwelling at the center has traces of white-wash, as you can see -- click on the photo to enlarge). For a sense of scale, the ruins in the cleft of the cliff face are 3-4 stories high. The cliff continues upwards (and curving slightly outward) for several HUNDRED feet and to the left and right as far as the eye can see. (See other photo(s).)