Secret places of New York City (that aren't secret anymore)

What are they doing? Go to the Whispering Gallery...
Now that the official NYC website has posted this list, these secret, nifty places aren't so secret anymore. And besides spilling the beans, NYC lists places that are not open to the public- and where you could get arrested for trespassing. I guess NYC government needs to increase its arrest numbers? Anyway, some of these places are indeed very cool, like the Whispering Gallery in GCT. Other places are just too far away! Sorry Boat Graveyard! Check it out here...and dont get caught!
Secret places of New York City