The coastal dunes of Médano Blanco in central Argentina are a rumpled band between blue seas and patchwork green farmlands. Strong westerly winds shape the whole landscape from waves to dunes, and even within the cropland.

Image credit & read more: Earth Observatory For a massive, unannotated version, click here.

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The dune ridges form perpendicular to the prevailing wind, while in the farmlands blowout hollows fill with water to scatter lakes amongst the crops. More subtly, the health spa is protected from the wind by a ring of dark green trees.

Dunes form anywhere with a sediment supply and wind, including Mars! Read more about Martian dune processes here and here.