From nycsubway.org Some stations are fully abandoned, rotting away and seen only from passing trains. Others are in use as storage facilities. Some have extra platforms that were closed long ago. And some, like City Hall, are architectural marvels that give a glimpse into the city's past.

New York City is home to several "ghost stations" that were once vital parts of the transit system but have since been decommissioned due to changes in train lengths, low ridership, or proximity to newer hubs. The most famous of these is the City Hall Station on the 6 line, which opened in 1904 as the system’s flagship. It is a stunning architectural marvel featuring vaulted tile ceilings, leaded glass skylights, and ornate chandeliers. While it was closed in 1945 because its curved platform was too short for newer, longer trains, you can still catch a glimpse of it by staying on the 6 train after the Brooklyn Bridge stop as it makes its "loop" back uptown. Other notable abandoned sites include the 18th Street Station (Lexington Avenue Line), which was closed to speed up service to 14th Street, and the Worth Street Station, which was replaced by the expansion of the Brooklyn Bridge-City Hall complex. There is also a "lower level" at the 9th Avenue station in Brooklyn and the abandoned platforms at the 42nd Street-Port Authority stop. These stations serve as a subterranean museum of NYC history, often covered in decades of graffiti and urban decay.