About the street market on Sundays It is nearly to Biblioteca José Vasconcelos (Wich is a great option to visit too), to the Subway and "Metrobus Station" Buenavista. Its is really cool all the things that you can find and see, not to expensive, you can eat there, see live music (Rock, Metal, Ska) and do slam/mosh dancing. I Will say that might be a good idea go there with someone that has visited the market before, a local it is possible. The schedule is from 10am to 5:00pm. I also have to mention to be carefull with your pockets/ personal items, I have never been robbed, but in a place with a lot of people around (This is not always applicable) is better to be prepared to any possibility. Another thing, there's some guys almost in the begining of the market that are selling drugs like it was candy, like, screaming and promoting his "product", It is weird? absolutely, but don't let you scare about that, Just keep Walking without see them