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9th Annual Smithsonian Magazine Photo Contest Natural World
A rimstone dam in the Frozen Niagara section of Mammoth Cave.

A rimstone dam in the Frozen Niagara section of Mammoth Cave.

Photo Detail
Date Taken: 07.2011
Date Uploaded: 09.2011
Photo Location: Kentucky, United States of America
Camera: Canon EOS DIGITAL REBEL XSi
Copyright: © Kira Smith