Manhattan: Central Park - Reservoirs - Lower reservoir.

(1) Central Park: Lower Reservoir, western side, the water gate opposite about 82nd Street and Central Park West. March 30, 1931. P. L. Sperr. (2) The same, another water gate north of the first one, and opposite about 85th Street. March 30, 1931. P. L. Sperr.

Photo from the New York Public Library - Milstein Collection