Not all of Grand Central Terminal's history is so obvious to the naked eye. The secret (well, not-so-secret, now) Track 61 was a platform on a single-line rail used by Franklin Delano Roosevelt, and ran to a passage at the Waldorf-Astoria hotel, where a freight elevator would take his armor-plated Pierce Arrow car to street level once it was unloaded from the train. FDR's hyper-reinforced train car still sits under the Waldorf, and the track has actually been put to some use since FDR's presidency—it was a site for Andy Warhol's 1965 "Underground Party."