One of my favorite songs of all time, Harlem River Drive, can be found on Soundcloud as a repeatedly covered and remixed tune:
The Library of Congress has a great short of horse racing on Harlem River Drive. Note the Aquaduct Bridge with its full complement of masonry arches before the center arches were replaced with a steel span to permit boat traffic:
Note the people on the Aqueduct Bridge, taking the parade of wealthy families and their horses.
To see the full 1903 film: