Have another look see, and this time do what I did. Start from the factory original, then crop, then enlarge, then read a little more, then go back and reenlarge and this time apply a few filters, then read some more, then ponder and then you tell me what it is that's different from the surroundings of common rock, channels and erosion.

Try to explain that "fluid arch", those connected reservoirs, the airship, the suspension bridge and so on.

http://geocities.com/bradguth
and
http://guthvenus.tripod.com