Paid a visit on a wet and wind day in Rio! They have guided tours during the day for R$10. Confusing system to get in though- you have to get a token from the guy in black on the door and then go to the box office to buy the ticket-BUT they only have a limited # of tickets per visit and they only start handing the tokens out 30mins before the start of the tour! Once inside the guide said she would not speak the whole tour in English (it was given in Portuguese) but she did answer my many questions. Very beautiful interior around the actual theatre- which unfortunately we only got to 'see' in the dark as they were sorting the lighting out for the weekend show! Worth a visit when it rains!!