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| When the wind reverses direction, these little walls build up along the crests of dunes. White Sands National Monument. |  Original Image |
| Total images: 36 | Last update: 10/19/09 6:38 PM | Help | |
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| When the wind reverses direction, these little walls build up along the crests of dunes. White Sands National Monument. | Original Image |
| Total images: 36 | Last update: 10/19/09 6:38 PM | Help | |