Buenos Aires
Food
Steak. The famous place is Cabanas de Las Lilias. The NYTimes said eating there is worth flying there from the US!
To Do
There is the cemetery where Eva Peron is buried which is pretty cool (Recoleta). The cemetery itself is quite grand and a lovely way to spend an afternoon on a sunny day.
There's a cultural center in the mall on Calle Florida - I can't find the name. But they have about 6-8 tango classes daily with excellent instructors. It's about $8/class. A fun way to pass the time.
Watch tango. The two most popular places are Confiteria Ideal, which will have a milonga (not a performance, but rather a place where people go to dance tango. You go w/o a partner and wait to be invited to dance. The whole thing is super cool.) Cafe Tortoni is a famous place to watch a tango performance. It's excellent!
Sit in cafes and have excellent coffee. Cafe Tortoni is a great place to sit; it's the old haunt of Borges.
The street fair in the San Telmo neighborhood on Sundays. Nice atmosphere, impromptu FREE tango performances
There's the Palermo neighborhood which is very hip and fun. Great cafe culture, nice design stores.
Supposedly a great place to get leather anything (boots, jackets, etc.). My sense was that the prices weren't that much cheaper (maybe 20%) but the plus was that it was all made to order/fit. I don't buy leather, so I didn't really explore that.
Remember that things don't open on weekend morning until 11 am or noon (more like noon). People don't eat dinner until about 10 pm. Go to dinner at 8, and the restaurant will be deserted.
I would totally recommend a daytrip to Mendoza, the wine country of Argentina.
The other thing that I didn't do but would've love to have done is visit a ranch outside of Buenos Aires. It's supposed to be a very different vibe -- relaxed, outdoors, etc. Tour companies will arrange daytours out to a ranch.
Also, for some reason, Argentinans love the Simpsons. If you like the Simpsons, you can get all sorts of awesome t-shirts there.
