Parque Ibirapuera

(photo Dornicke wiki commons)

This is the most important park in São Paulo. A place to relax, walk, play some sports, visit many museums, and check a live music free concert.

The Obelisco is our monument to the 1932 Constitutionalist Revolution of the State of São Paulo.

The park is big, and has many lakes, gardens and places to shill out. Some more info about this park in wikipedia.