6. Lakefront Park and Michigan Avenue looking northward from Congress Street (photo ca. 1868-69). The trees planted along the fenced sidewalk of Lakefront Park, Chicago's primary promenade area before the creation of the 1869 park system, are visible in this view. Starting in the 1850s, the Illinois Central ran along the track on the trestle in the water. Grain elevators are at the right in the distance. Chicago Historical Society stereograph, ICHI 04438.