MagSec4
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hyena: Hehe.. actually, that is exactly what I was going to add to my post as an edit a few seconds after I sent it. But I honestly thought people might not get it..
A train or some other kind of elevated transportation tube is what came to mind for me as well when I first saw the image.MagSec4 said:Or.. that could easily be the above-ground tunnel which carries the train that goes into the train station in the east side of the city.