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great sand dunes national monument

Great Sand Dunes National Park and Preserve

Added by yongli on 03/31/2017 - 16:17, last changed on 03/23/2021 - 16:21

Great Sand Dunes

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The Great Sand Dunes sprawl along the eastern fringes of the vast San Luis Valley of south central Colorado, covering an area of nearly thirty square miles. They are the tallest aeolian (wind-produced) dunes in North America, heaping mounds of sand that tower more than 700 feet above the valley...
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