9. Saks Fifth Avenue Had a Secret Tunnel 

We’re big fans of tunnels, and even bigger fans of clandestine ones. Although we weren’t able to uncover much information about it, various sources make mention of a secret tunnel that once connected Saks Fifth Avenue to Rockefeller Plaza. Unfortunately, Saks publicist Katie Majeski tells amNewYork that it’s no longer active.

Next, check out 7 Secret NYC Tunnels You Probably Haven’t Heard Of.