Notice those fine, precise, square, carved, rocks piled on top on each other to create a wall.
Or are we just looking at a natural formation ?
See the NASA source image, the video and judge for yourself.
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Original NASA link (1). Click HERE
Original NASA link (2). Click HERE
The remnants of an ancient wall on Mars.
Click on the images to see them in full screen.
MSL 1157 Gigapan below.