Mars occasionally has cloudy weather. We intended to take a picture of the bright ice-covered dunes that are faintly visible through these thin clouds, but weather forecasting on Mars is just as challenging as on Earth.
Where the clouds are thin, the remaining bright winter ice is visible, protected in shallow grooves on the ground, in addition to covering the dunes.
Photo credit: NASA/JPL/University of Arizona
Note: And, no, that is not the Face on Mars. ;) Although it does remind me more of those moai (statues) on Easter Island.