Eleven years ago today, both the world and the Manhattan skyline forever changed when the World Trade Center came crashing down. Shots of the Twin Towers were often used to establish the movie's location. Nowadays, using the towers as an establishing shot often means the film is taking place in another time period before September 11, 2001.
Famous scenes were filmed both in and near the towers, which came to represent many things to many people -- often serving as the place where key plot points took place. Here's some examples: