Two large rectangular black areas are visible, separated by a rectangular column, and in front of the structure on the left is another building, reports ufosightingshotspot.blogspot.com.
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But before we assume that this is a secret base, there is also the possibility that the structure is nothing more than a compression artifact caused by the pixelated digital compression software.
Although the surrounding craters do not have such structures, this suggests that the huge structure in this crater is not a compression artifact, but a hangar with two (black) entrances to accommodate spaceships.
Google coordinates of Mars: 10 ° 47’20.46 “N 130 ° 0’41.91” E.