This was
your sky.

A Martian Metamorphosis

Is it an Escher, or Mars? Three different types of surfaces in the North Polar Cap of Mars morph into each other, reminiscent of M. C. Escher's works. On the far left, dark sand covers the ground, while the center shows a transition to a dune field. On the far right, a transition is made to a much lighter surface, likely containing a larger amount of ice. Shadows indicate that lighter material holds the higher ground, with some steep cliffs on the divide.