New York City SubwaysNew York City Subways traces the history of mass transportation in Manhattan and New York City's outer boroughs. Public transportation has long been vital to the city, with horse drawn surface lines established by 1831 and elevated railroad lines constructed during the 1870s and 1880s. The concept of subways, railroads operating underground, originated in London in 1863 and was applied to New York City by 1904. This collection of vintage postcards