Union Station's cavernous interior was used as the police station in the uber-classic Blade Runner. Just imagine this huge space filled with smoke and M. Emmett Walsh. Further pretend those folks in the pic are all replicants!
Some time soon I gotta check out the Bradbury Building downtown, another famous local Blade Runner location.
Photo taken from Wikipedia. http://upload.wikimedia.org/wikipedia/commons/d/d9/Union-Station-LA-Waiting-Ro.jpg Copyright its respective owner.