The argentinian side of the falls are better (IGR)....much better views than the brazilian side. you can only see http://instagram.com/p/mUBcokjXMl/ and http://instagram.com/p/mUAfY1jXLd/ from the argentinian side.

GIG is a bit far from the city center but you can do it...I did sugar loaf one day and ipanema and copacabana the next day. I didn't feel like going to Christ Redeemer (locals say the views are better from Sugar loaf in any case). If you go to Sugar Loaf...go in the evening...the sunset from there is STUNNING (http://instagram.com/p/mqx2cJDXDL/)

enjoy rio....nice place and don't miss the fresh fruit...to die for!