Milwaukee is one the few cities which has built a 21st century building that in many ways has already come to define the city.
Calatrava's Milwaukee Art Museum addition:
Source:
https://commons.m.wikimedia.org/wiki...outh-west.jpg#
It's not just a great building, it's so damn iconic that it has come to be the defining image of the city now. And it also completely overshadows the original Saarinen art museum building built back in the '50 (which is pretty awesome in its own right, but nowhere near as flamboyant as calatrava's exuberant white palace next door).
And it has a special place in my heart because my wife and I had our wedding & reception there 10 years ago. It made for one hell of a spectacular venue for our big celebration.