8. The Secret Train Platform Under the Waldorf-Astoria

The Waldorf-Astoria Hotel was built atop one of Grand Central Terminal’s many early platform lots through a lease of air rights. Although it is now abandoned, the space was at one time used to transport the hotel’s famous guests, including General John J. Pershing. The most famous patron of the line, Franklin Delano Roosevelt, allegedly traveled via this track in an employed, custom-made, armored train cart that would bring him straight to and from the hotel.