This is amazing Colin. The skyway looks more typically sci-fi than the more ancient-looking ruins below, but that makes the potential backstory even cooler. Like maybe this explorer is among the bones of a civilization so long dead that there are ruins spanning hundreds of millenia side by side.
I don't see how they would be necessary since for the most part a lot of the land was natural. There wasn't a city or town taking over ALL of the land in every inch. There were lots of towns cities and villages but they were apart.
I don't want to dump on the guys imagination though. I mean, its kind of a cool idea.