Hogwarts School of Witchcraft and Wizardry
This massive model was built for the first film and was then used during the production of most of the Harry Potter films. The scale of the model is absolutely breathtaking. The model's ambient light changes to produce day and night cycles.
During the night cycle various lights inside the school switch on. See www.flickr.com/photos/jedi58/7965576470/in/photostream for Hogwarts during the night.