This photo was taken by the Global Mars Surveyor mission. I was searching through some NASA photos and came across this one that shows a foundation in a square pattern. The lower left hand corner is still standing and has another smaller structure near it.

This structure takes ups a whopping 20% of the entire photo! These walls (building actually) were just one large structure, but over millions of years in space, they get covered by cosmic dust particles and get buried. It would take millions of years for that to happen.

This is an archaeologists dream come true. It doesn't get more intestine than studying a ancient culture on another world. SCW