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Date: 2012-09-25 03:15:46Colorado Plateau Native American history Puebloan peoples Dark sky parks Natural Bridges National Monument International Dark-Sky Association Sipapu Bridge Dark-sky preserve White Canyon Utah Geography of the United States Western United States | Natural Bridges National Park ServiceAdd to Reading ListSource URL: www.darksky.orgDownload Document from Source WebsiteFile Size: 2,11 MBShare Document on Facebook |