Edit: Disclosure, I have been to Microsoft's campus, but I just couldn't help but ask this question. :)
The campus has grown so much, however, that it has sprawled over several wide/ugly/pedestrian-unfriendly suburban roads in the process; there is substantially less greenery today than even a few years ago.
In case you can't tell, I've been back in Chicago for a year now and the weather is absolutely killing me.
Every conference room has a theme and they allow self-guided tours. My favorite conference room is one where half of the room opens up to a pond that has a wooden walk way around it and a waterfall.
The reason I asked was because I wanted to see Microsoft categorized in such an easy and quick manner as Google/Apple. I must admit that I myself can't do that.