São Paulo has a thriving culture scene that can be seen in its museums, craft fairs, graffitti, and artsy shops. If you spend a Sunday there, be sure to head over to São Paulo's main avenue, Avenida Paulista, for a three-part cultural experience. First, the Museu de Arte de São Paulo (São Paulo Museum of Art, or MASP) is well worth a visit. It houses Latin America's finest collection of Western art, including pieces by Picasso, Rembrandt, Monet, and other European masters. The museum also houses excellent temporary exhibits. If you're hungry, you can eat at the museum's cafeteria or wait and get snacks at the nearby crafts market. As you leave, spend some time perusing the huge antiques market that takes place every Sunday under the museum. Then cross the street and wander the "feira," or crafts market, for typical Brazilian crafts (some of which are quite expensive) and good street food. Finish up with a stroll in the adjacent Parque Trianon, where musicians often play on Sundays.
MASP is open 10-6. Admission is about $8 and $3.50 for students. Parking is available in lots and garages on side streets, and the metro station is Trianon.