Digital Domain’s mindblowing body of work
So Digital Domain is behind much of the cool effects in Hollywood. They have worked on movies such as the Lord of the Rings, Flags of Our Fathers, Titanic and scores more. The reels are combinations of the actual end effect and what took to make it.
The reels come in many flavors: Company, Character, Vehicles, Environment, Natural phenomenon, Matte Painting, Water, Humans & Compositing. A lot of these reels intersect so there is plenty of repetition.
Also they have page on how it is done (go to home, then click features, then behind the scenes).