Something a little closer to home: our moon.
Mare Frigoris, the Sea of Cold, is not, as you might expect, one of the frozen-looking gray patches in this image of the moon's far north, but rather the dark brown swath running from the left to the center.
The dark brown crater below the mare is Plato, which for some reason I always read as Pluto. It's not quite that cold there.
Image Credit and Copyright: Matt Smith