During nights, this is the northern terminal for the Lefferts Boulevard shuttle train from Ozone Park, Queens.

Construction on the Euclid Avenue station started in 1938, but this part of the Fulton Street Line did not open until 1948.

The lighting also ruptured a gas main at the site, creating a fire and causing damage to an adjacent building, while two automobiles fell into the exposed tunnel cavern.

[8] Construction of the extension was halted in December 1942 due to material shortages caused by World War II.

[5][11][12] The station also featured a then-modern interlocking technology, known as the "NX" system, wherein train operators would press buttons that automatically adjusted the corresponding switches.

It is the easternmost express station on the IND Fulton Street Line in terms of geographic directions.

In this system, the tower utilizes a 12-foot (3.7 m) wide, 3.3-foot (1.0 m) tall electric light signal board, which features a diagram of the nearby stations and track layout.

Outside fare control is a street elevator leading to the northeast corner of Pitkin and Euclid Avenues.

[29] The next station east (railroad south) for IND Fulton Street service is Grant Avenue, located in City Line, Brooklyn.

However, an unfinished station is rumored to exist at 76th Street in nearby Ozone Park, Queens, just four blocks east of Grant Avenue.

It was planned that these tracks would continue under Pitkin Avenue to Cross Bay Boulevard, as part of a never-built system expansion which would have extended the Fulton Street Subway to the Rockaways and to Cambria Heights near the Queens-Nassau County border.

[32][35] As late as 1951, the mainline and relay tracks were still planned to be extended as far as 105th Street (the modern location of Aqueduct Racetrack), with a connection to the then-recently abandoned Rockaway Beach Branch of the Long Island Rail Road east of Cross Bay Boulevard.

The New York Times, referring to the rumor as the "transit Atlantis", has likened it to the Roswell UFO incident or the Kennedy assassination conspiracy theories.

[32] Steve Krokowski, a retired transit worker and police officer, was quoted by the Times in reference to the station, mentioning: However, there is also significant evidence against the existence of the station, including a lack of newspaper coverage, the lack of subway infrastructure such as ventilation grates or skylights on Pitkin Avenue in the area, and the absence of documentation of the work from the Board of Transportation or the Board of Estimate.