Strange object in photos of the surface of Mars

On the photos of the surface of Mars, published by NASA and used in Google Earth service, you can find many interesting things, for example, an unusual form of a mountain in which unusual projections are visible from above. There are only 4 of them, and one very much looks like a hatch.
What is this mountain, 2.3 km long and 500 meters wide, similar to a building, a bunker, or maybe it’s a Martian space ship in general?
Coordinates: 7.611606 °, -80.594919 °