Check this out - The city of Olympus from the DVD version of Masamune Shirow's manga series
Appleseed. Although this is a CG movie and not strictly an anime cartoon movie, I thought the city scenes in the DVD weren't half bad, although I like the manga series a lot better than the DVD as a whole for the characters and storyline. Check out those giant mirrored things. Each of those is supposed to be an arcology, which is basically a city in one huge building.
The two giant mirrored arcologies in Olympus - cities wthin a city.
The arcologies close up.
Olympus at night.
This is not Olympus. It's the ruins of another city where Deunan Knute, the show's main human character, was taken from in the beginning of the movie.
Shiny city!