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The most endangered historic places in the U.S.

By: Ashley Chase on June 27, 2011, 10:30 a.m.
bear butte in south dakota

Photo: Lars Plougmann/Flickr

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Bear Butte

For thousands of years, Native American tribes have journeyed to this sacred prayer site in South Dakota that is believed to be the physical location where the creator communicates with his people. The 4,426-foot mountain is threatened by possible energy development in the area, which would degrade the sacred site and cultural landscape.