New York and the East River circa 1910. "Looking east from the Singer Tower." 8x10 inch dry plate glass negative, Detroit Publishing Company. From Shorpy.com
The Library of Congress Photo Archives have a good selection of Brooklyn period photographs. You can views some of them here: Brooklyn Post Office and Eagle Warehouse, 1906.
Polo Grounds, New York City, during World Series Game. Photograph by Bain News Service, 1913.