|The following is based on Fallout 3 cut content and has not been confirmed by canon sources.|
Crystal City was going to appear in Fallout 3 but was cut from the final version of the game.
Behind the scenesEdit
In real life, Crystal City is located directly and shortly south of the Pentagon, easily seen on a map. It is highly plausible that Crystal City was an early version of the Mason District, since the Mason District does not exist in real life, and also that the Mason District is in roughly the same location in which Crystal City seemingly would be.