In an article spanning all sorts of subway security, the Brooklyn Eagle takes a look at secret emergency exits throughout the system. Did you know that in Brooklyn Heights, there's a fake brownstone leading into the underground? They report that the three-story building "looks like any other on the cobblestone block, but it isn’t. It leads directly down to the nation’s largest subway system. If you opened the door [to exit], you would find yourself on a stoop, which is just part of the façade." (Kind of like Sesame Street?) The Heights in particular is home to many secret exits, unknown to most except for some locals. If you want to find the brownstone, it's the one armed with silent alarms, motion detectors and other hidden security. Better stick to the regular way out. UPDATE:Curbed threatens our city's security by posting photos of the decoy brownstone!