The Underbelly Project
"Combining street art with spelunking, The Underbelly Project is a real collection of works that exists four stories beneath the surface of the City. But good luck finding it.
Street artists Workhorse and PAC curated the underground exhibit in an abandoned subway station, but the exact location won't be released to the public, for fear of legal repercussions. (If caught trespassing on or defacing MTA property, they could be arrested and fined.)
Each of the 103 artists had one night to finish his or her piece. One by one, Workhorse or PAC led them to the space -- which entailed a difficult and dangerous process of waiting for the active station's platform to clear and then maneuvering through an old entrance to the abandoned tracks of yore -- where they let their creative juices flow."