Here we have a big problem: most of people doesn´t speak English. So, if you wanna an information and your are out of the hotel, be patient. Maybe the person understand you but can´t explain... so, give a time and wait. You can talk by sing language :)
Beware! This is the Planalto Palace! That's the siege of the Brazilian government! That's where the president works daily! So please in case you meet him RUN! The man is a thief and he's coming for your head!
The national park of the city is as diasappointing as the city is. The main attractions are the artificial pools there, and although it is a good chance to escape the heat and having a picknick, they are no accompanied with any additional natural sites or spots. So forget about nice hiking routes, waterfalls or animals.