As an American moving to SP, this was one of the most striking things when I first arrived by air. It's buildings, as far as the eye can see, and it looks different somehow: https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2F...

Then you realize later that it's all architecture, free of advertising. Sadly, it's not completely clean - on the way from GRU there's still a decent amount of high-standing billboards and generic crap.