Recently I was lucky enough to visit Fundación Proa in Buenos Aires. It's an absolutely gorgeous building by Caruso-Torricella Architetti and I highly recommend checking it out if you're in the city...especially the rooftop terrace.
I know I'm so late to the party on this one, but I just discovered Phoenix...and I think I'm in love. Listening to "If I Ever Feel Better" (thanks Richard).