"In this June 22, 2016, photo, a laminated sheet of paper held in place by a loose rock rests inside a series of ancient cliff dwellings that are nestled underneath a spectacular red rock overhang, near Blanding, Utah. ""Don't erase the traces of America's past,"" the signs read. ""Please do not enter interior rooms."" The weathered signs and a similar warning at the trailhead are the only protections in place for these Anasazi ruins easily accessible along a canyon hiking path. (AP Photo/Rick Bowmer)"
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