Smiley on Mars
Unnamed crater on Mars

From the page (https://mars.nasa.gov/resources/5991/)

This picture of a crater resembling a “happy face” was taken in January 2008, by the Mars Reconnaissance Orbiter’s Context Camera. The unnamed crater is almost 2 miles (about 3 kilometers) across.

Credit
NASA/JPL-Caltech/MSSS

larger image here

Check here for more info:  Galle Crater

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