See Incredible Photos Of The NYC Subway Getting Built In The Early 20th Century

7th Avenue and 42nd Street in Manhattan, 1914

Lexington Avenue, between 105th and 106th Streets, in Manhattan, 1913

9th Street subway entrance in Brooklyn, 1910

An excavated boat found in Manhattan in 1916

Workers in the Greenpoint Tube, 1929

4th Avenue and 10th Street in Manhattan, 1900

17th Street and 4th Avenue in Manhattan, 1902

East River Tunnel Construction, 1907

Willets Point Station in Queens, 1927

Workers in a pump chamber in The Bronx, 1916