| 1 | There are lots of dunes in the desert. | |
| 2 | My LED headlamp lit the white sand dune. | |
| 3 | In the northwest, the dunes are interrupted by cityscape. | |
| 4 | They often form along the boundary between the dune and thesurface below. | |
| 5 | Morning light breaks through the clouds. Great Sand Dunes National Park, Colorado. |
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