Save Save Remove Delete Pre-Columbian peoples used these ledges as protection from rain and snow in Walnut Canyon National Monument, located about 10 miles from Flagstaff, Arizona. The canyon’s rim elevation is 6,690 feet Its floor’s is 350 ft lower. A long, looping trail leads to 25 cliff-dwelling rooms constructed by the Sinagua cultural group that lived in the gorge from about 1100 to 1250 CE. (CE is an increasingly accepted designation — as of 2018 — denoting the current “Common Era” as opposed to the older, less-regarded term “AD,” or the period after the death of Christ.) Original image from Carol M. Highsmith’s America, Library of Congress collection. Digitally enhanced by rawpixel. MoreFree public domain CC0 imageID : 582346 Jpeg Web size Jpeg 1200 x 900 px | 300 dpi Large size Jpeg 3500 x 2625 px | 300 dpi Original size Jpeg 11608 x 8708 px | 300 dpi View license We've made this image available to the public domain providing everyone access with a CC0 license.Free for personal and commercial use.No attribution required.