As it is EASY for me to be sidetracked, I did NOT go thru the links posted immediately above (#943)
IS this 'evidence' there, or somewhere ELSE on the Web?
The official view towards the "Hydaspis Chaos region on Mars:
Richard Hoagland's version of the story.
NASA, as usual, sees this image as more tricks of light and shadow. To less jaded eyes, the image has a familiar look to it, i.e. that of ordinary city blocks and streets.
Tom Van Flandern's Press Club presentation resides here.
Take a careful look at item 46. That one does not show megalithic face images or pyramids; just ordinary rectangular structures in rows, for ordinary people to live in. You'll note that the upper right corners to windward are weathered while the lower left corners to leeward are still sharp and retain their 90 degree angles.