What's your favorite campus and why?

Between my undergrad, PhD, postdoc, faculty and visiting positions, I've probably spend significant time on 10+ university campuses. Some of these campuses stood out because of their architecture, location, campus layout, weather or culture. And, while I can probably narrow down my favorite campuses to a list of two or three, it would be difficult to pick an absolute favorite.

Which campus (or campuses) are your favorite and why? I'd be particularly interested to learn about campuses outside of the USA.