The Avengers
The Hulk seems to be the major work of the Avengers’ visual effects, but actually the entire film is created using special effects, including the background of the city of New York, which is also CGI.
Sorry to burst your bubble, but as real and convincing as it looks, the filming takes place inside a studio (the one with the green screen), and not the streets of New York, which actually constitute one of the film’s best demonstrations of CGI.