Unfortunately, the place looks like it has been abondaned many years ago. There is a center of touristic information at the entrance, but when I've visited it was closed (friday morning around 10am). Inside the place there isn't a guide explaining about the attraction and each floor is completely empty! Only at the fourth floor there is a open view...
Quite an unusual place where the visitor will be surprised to see what this old "factory" or energy generator contains behind its walls - a bit of everything concerning the arts and the local culture. It sits right on the water front.
The sunset there is amazing! Wait for it outside Usina do Gasômetro. It´s totally worth your time. The building itself is really nice, considering it was an old gas factory transformed in a cultural center for now. The chimney is one of the most iconic symbols of the city.