The New York City subway is used by millions of people every day, but most are simply trying to get from point A to point B, unaware of the secrets a simple subway may be holding. Behind the noise, the rush, and the endless announcements, the subway also keeps a number of hidden wonders. Abandoned stations, hidden doors, vintage trains, and even lesser-known features like Track 61 are waiting to be discovered. Once you know where to look, the subway becomes far more interesting.