I always got a kick out of knowing the building they used for Nakatomi Plaza was located here in Southern California, in Century City.
I think of the movie every time I drive by the area.
http://diehard.wikia.com/wiki/Nakatomi_Plaza
https://en.wikipedia.org/wiki/Fox_Plaza_(Los_Angeles)
They use it as the setting for Spencer Tower on “The Bold and the Beautiful” soap.