[link to photojournal.jpl.nasa.gov]

Forgive me if this has been noticed already, haven't read all 6 pages, but there's another figure in the same pic in the center of the stone structure. Zoom in slightly and you can see it, looks almost Mayan really. I have firefox image zoom add on so I zoomed it 400% and it's definitely strange looking.

Don't know what the lizard like thing next to it is, that looks more like it could be a natural formation. Or not.