Inside Grand Central's Secret Sub-Basement, Which Nazis Nearly Destroyed
Channel: Gothamist
Date: 2016-09-20

We visited the sub-basement of Grand Central Terminal (known as M-42, it's not on any blueprints!) with the MTA's Dan Brucker. It's said that Hitler once sent a small group of Nazi saboteurs to infiltrate the basement—that story and more can be found here: http://gothamist.com/2015/10/14/grand_central_hilter_nazis.php

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