American Journeys | Great Sand Dunes National Park and Preserve: Bison, U.F.O.’s and Schussing Without Snow
At the Great Sand Dunes National Park in southern Colorado, 30 square miles of sand pile up in dunes as high as 750 feet.
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At the Great Sand Dunes National Park in southern Colorado, 30 square miles of sand pile up in dunes as high as 750 feet.
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