Since the doors of the first subway train opened in 1904, New Yorkers and tourists alike have been fascinated, amused, amazed, repelled and bewildered by the world-within-a-world that lies beneath the city. Now, as the subway celebrates its centennial anniversary, the creator of The New York Times 's award-winning "Tunnel Vision" column leads us on an extended tour of this storied subterranean land, revealing: * Its inhabitants: the Tango Man, the...