Thank you to Transit Miami who first brought this to my attention. This video is about the Berlin Hauptbahnhof Station. Yes it's in German but very interesting none the less. The Berlin Hauptbahnhof Website says that the station handles 1100 Trains per day. That is just intercity trains and does not count the streetcars and light rail.
To put that in perspective the Salt Lake International Airport handles 900 flights a day.