Opened in 1904, New York City's MTA subway is the world's largest rapid-transit system, with 36 lines and 468 stations, both underground and above ground/elevated, all operating 24/7. Though these days increasingly challenged in terms of service and cleanliness, it still provides fairly reliable access to much of the Big Apples five boroughs to a daily ridership of up to 6 million, with a central nexus at Manhattan's Times Square. The system has been gradually expanded over the years with new lines and stations, most recently in 2017.

Read about others in Tripatini contributor Gateway Holidays Ltd's post5 of the World's Most Interesting City Metro Systems.

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