It's Buenos Aires. So of course we visited the Evita museum. It's not particularly well-done, it's clearly very biased, but still, fun to visit -- if for no other reason than her shoes. They were lovely.
The parks are very pretty too. And I visited the Museo de Belles Artes, which had a good collection of Argentinian art and an audio tour that I really enjoyed. The man on the tape spoke like Antonio Banderas and it was fun having him whisper in my ears!!
Around midnight, Jordana and I discovered it was gallery night in Palermo and so we walked around town visiting galleries, sipping cheap wine, and having a great time.