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7th Annual Smithsonian Magazine Photo Contest Natural World
Mysterious geological phenomenon on the Brule River along the North Shore of Lake Superior in Minnesota.

Mysterious geological phenomenon on the Brule River along the North Shore of Lake Superior in Minnesota.

Photo Detail
Date Taken: 08.2009
Date Uploaded: 12.2009
Photo Location: Grand Marais, Minnesota, United States of America
Camera: NIKON D70
Copyright: © Mark Ryan