23rd Street (IND Sixth Avenue Line)

23rd Street is a local station on the IND Sixth Avenue Line of the New York City Subway. Located at the intersection of 23rd Street and Sixth Avenue in Manhattan, it is served by the F train at all times, and by the M train on weekdays. This station and 14th Street are the only two local stations on the Sixth Avenue Line.

There are two tracks and two side platforms. There is no crossover or crossunder, and no mezzanine. The PATH tracks, which were built forty years before the Sixth Avenue Line, are behind the trackway walls where the express tracks would typically be. The Sixth Avenue express tracks are underneath the PATH tracks and were constructed using the "deep-bore" tunneling method in the mid-1960s. Neither the PATH tracks nor the lower level express tracks are visible from the station.

Each side of the station has four street staircases and a direct indoor entrance to the 23rd Street PATH station. Two of the four entrances on each side appear to be part of the original 1911 PATH entrances. The tile band is lime green. The tile band on the track walls appears to be obscured by support beams directly underneath 23rd Street.

On the express tracks on the lower level, the deep-bore tunnel's round shape becomes square below this station and at 14th Street stations, where provisions for lower level platforms were built.