18th Street is the abandoned New York City Subway station whose platform area can be seen from passing trains on the Lexington Avenue Line.
The station opened in 1904 as part of the original IRT subway. It was closed in 1948 after longer trains made its short platforms impractical, especially once nearby stations were lengthened to handle more passengers.
Although trains no longer stop there, parts of the station remain visible through the windows. Riders may notice tiled walls, signs, and the outline of the former platform while traveling between Union Square and 23rd Street.
The station is sometimes mistaken for other closed IRT stops, including Worth Street and City Hall. Unlike City Hall, 18th Street is not a preserved terminal with a dramatic loop; it is a former local stop embedded in an active tunnel.