Mars has some cool landforms, including spirals a 100 feet across:
http://io9.com/5904905/why-are-there-spirals-on-the-surface-of-mars
http://www.sciencemag.org/content/336/6080/449
The location is south-east of Elysium, just around the border to the white Zone.
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That's actually an interesting though; unusual, but natural, formations on Mars being mistaken for possible TITAN machine activity. All sorts of silly stuff might occur as result.
Or worse, TITAN machines concealing themselves and their activity in natural formations.
Are the spirals natural? Or are they a nanoswarm excavating in preparation for materials?
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