The Mars Global Surveyor was officially launched off into space in order to analyze the Red Planet in all of its glory. It was meant to be the bridge that would essentially help us get the answers we really needed regarding Mars and to some extent, it definitely cleared up a lot of information right off the bat.
During its second mission for example on September 11th, 1997, the following pictures were reported back by the Mars Global Surveyor, and as you can tell they instantly became quite popular amongst the many different theorists online.
This picture in particular appears to showcase the outline of either a massive structure altogether or the outline of a city. Either way, it does appear to be artificial, to say the least.
NASA has strangely enough been ignoring the pictures for the longest time now. Despite the fact that they usually want to clear up any rumors they haven’t reported on this discovery not even once, and as far as we can tell they won’t do it anytime soon either.
Its third mission began soon after but to everyone’s shock and dismay, the Mars Global Surveyor stopped responding to the commands and it ended up crashing down on November 2nd, 2006 right as it was about to come back home.
The project altogether was canceled back in January 2007 and as far as we know no plans of it being reestablished were reported as of yet.