Is an ancient national park in Brazil with more than 70 years. In low part you can walk and visit some small water falls, and high part is challenging, good for trekking for instance to reach Pico das Agulhas Negras, a 2700 meters peak.
Itatiaia is 272 km from São Paulo. Weather at nights is cold and best season to visit the low part is from October to February. The high part, in August.
Image: Itatiaia hills
Other interesting destinations in Brazil: Joinville and Sao Paulo. Brazil Beaches: Garopaba and Praia do Rosa .