This could be an black and white aerial photo of Colorado's Great Sand Dunes National Park, which has the tallest sand dunes in North America - up to 750 feet tall - and contains roughly 4.8 billion cubic meters of sand. But it's not. It's a full-color shot of a three-foot-high snowdrift. Snowdrifts and sand dunes are created in basically the same way though. Light snow or sand is carried by the wind until the wind's speed is reduced, usually by a stationary object. In the case of the Great Sand Dunes that stationary object would be the Sangre de Cristo mountains. In the case of this snowdrift it was a balcony wall.
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