So here are some better and real secret of GCT. 1) The tunnel from the 456 to the Time Square Shuttle is the original tunnel of the first subway line. It ran f

So here are some better and real secret of GCT. 1) The tunnel from the 456 to the Time Square Shuttle is the original tunnel of the first subway line. It ran from City Hall on the 456 track along the shuttle tunnel to what is now the north end of the 123. Walk that tunnel 100 years ago and you would standing on the tracks. 2) There is an abandoned level between the 456 concourse and the 7 train tunnel that was used for the original trolley line that was later replaced by the 7 train. 3) During the 60s there was a full size ICBM mockup hung in the great hall. 4) There is a body buried in the walls of the station - a construction worker who fell into pouring concrete a century ago and the body couldn't be recovered.