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Rhododendrites/Wikimedia Commons

Not everyone can see the station – you have to pass a background check first. City Hall was the ceremonial terminal of the first subway project in New York, according to Columbia University. It has a sharply curved platform, a Guastavino tile arched ceiling, skylights (blackened in World War II), and plaques praising the work and those involved. It was in service from 1904 until 1945.