aztec ruins national monument with chacoan pueblo, unesco world heritage site, new mexico

archaeological fortification ancestral southwest landscape national monument heritage doorways puebloan building landmark chacoan aligned terrain village history geology pueblo unesco mexico clouds spring desert stormy aztec ruins world storm site rock wall usa sky Chaco Canyon culture historical history Indigenous First Nations Indians Aboriginal population civilization masonry building doors walls architecture archaeology trail walk walking path windows west western southwestern trees sandstone mortar sand arid dry Animas River San Juan Mountains four corners region United States North America American