Train fanatic reveals underground secrets of the NYC Subway labyrinth

The unfathomably complex labyrinth of the New York City Subway is largely a mystery to riders beyond the few stations and routes they use every day.

But its sprawling tentacles — subterranean, open-air and elevated — are as clear as a sunlit pond to Peter Dougherty, 60, an amateur railroad enthusiast who’s been something of a mystery himself. So self-effacing that he’s never previously been photographed in the media, he might know more about the system than anyone outside the MTA — perhaps more than anyone inside it.