fun stuff
Port Authority Bus Terminal is one of fun stuff.

1. Port Authority Bus Terminal

625 8th Ave (btwn W 40th & W 42nd St), New York, NY
Bus Station · 822 tips and reviews

David T.David Teicher: There's a hidden door near gate 224. It leads to a secret tunnel system built by J Edgar Hoover. It's a bit of a maze but if you follow the right wall, you eventually end up in Ohio.