The image above is truly one of the most bazarre I have seen yet. It looks like a herd of wierd critters moving across a Martian plain. Malin's caption calls them "Defrosting north polar dunes" Mars 26 - Martian Anomaly Collection
Does this show an enormous tower on Mars or is it actually just an illusion of light and shadow. Try to look at it not as a tall tower but as a giant "V" shaped formation flat on the ground. It still looks like a tower to me though.