Okay, how in hell did we miss the Jacksonville Union Terminal, AKA: The 'Prime Osborn.' 15 million people per year, 1,000 employees not counting Railway Express, Southern Express, Adams Express, and The United States Railway Post Office. Hundreds of accidents, a dozen deaths and both tunnels and attic's (over the old 'Colored Waiting Room') and a ticket office with more twists, turns and huge cupboards then granny's kitchen.
Those tunnels and the attic's (several floors worth) are darker then pitch... Above that giant vaulted ceiling a doorway opens to an ancient one plank wide cat-walk above the ceiling plaster, just daring you to add one more body!
That place has got to be full of buggers and haints and I'm telling you there 'haint' no telling what will jump out at you.