"The secret train platform beneath the Waldorf=Astoria"
From Gothamist:
Over the weekend we had a chance to visit the long-abandoned
Waldorf-Astoria train platform, which allowed VIPs to enter the hotel in
a more private manner—most famously it was used by Franklin D.
Roosevelt, possibly to hide the fact that he was in a wheelchair
suffering from polio. The mysterious track, known as Track 61, still
houses the train car and private elevator, which were both large enough
for FDR's armor-plated Pierce Arrow car. Legend has it that the car
would drive off the train, onto the platform and straight into the
elevator, which would lead to the hotel's garage. Trainjotting
has some more history regarding the platform, known as Track 61, and
notes that the quest for it "has become a holy grail for many urban
explorers." ...MORE
HT:
Kottke