New Mars Forums

Ah, the Millenium Tower (of Tokyo, not to be confused with the ones in London and Frankfurt:)).

Here's a good link on it:
http://www.skyscrapers.com/re/en/wm/bu/101805/

Basically a small city in one building, but still very much just a huge skyscraper (e.g. only plants are decorations). When the plans fell through in Tokyo, they reworked it a bit and launched it for Shanghai (been dead there too for years).