Metropolis: New York City Water and Transit Infrastructure in Photographs

Metropolis: New York City Water and Transit Infrastructure in Photographs at the NYPL Digital Gallery. "...Over 600 images, primarily original photographs, plus selected published sources, on the themes of traffic, transit and water. The digital collection includes mass transit proposals and projects, dating from 1867; the multi-county Catskill Aqueduct system that still supplies the city's water; and the pioneering Holland Tunnel for vehicular traffic under the Hudson River."