This August 2012 photo shows doorways at Pueblo Bonito, Chaco Canyon, in northwestern New Mexico. Chaco Canyon, the center of a culture that flourished from the 800s to the 1100s, is run by the ... more 
This August 2012 photo shows doorways at Pueblo Bonito, Chaco Canyon, in northwestern New Mexico. Chaco Canyon, the center of a culture that flourished from the 800s to the 1100s, is run by the National Park Service and is accessible only via dirt road. (AP Photo/Margaret Matthews) less 
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Associated Press | Photo By Margaret Matthews
Wed, Sep 5, 2012 12:18 PM EDT