The stone right next to the wooden beam...
It's obviously a piece of Noah's Ark. There must be a wormhole on Mt. Ararat that leads directly to Mars. This would explain the flooding on Mars as well. Atlantis probably got sucked in through the wormhole as well and that's why those stone blocks are there.
Maybe the eminent scientists at the Discovery Institute will mount an expedition to Mars to confirm all this. On the other hand, who needs confirmation.