Mars, of course.
And I love the fact that the many landers and probes have now made me familiar enough with the surface of a planet millions of miles away that I can say, Oh, that's Mars, the same way I might say, Oh, that's Central Park.
This particular image from the Utopia Planitia was taken by Viking 2 in 1976, showing that unlike many places on our home planet, Mars hasn't changed much in the past 45 years. It's not far from where the Chinese Zhurong rover landed earlier this month.
Image Credit: NASA, The Viking Project, M. Dale-Bannister (Washington University)