Was that really there?

In 1880, this aero-perspective representation of New Brunswick was drawn, with incredible detail of buildings and features that still holds up today (Click on the image to see more detail). But an interesting twist is the promenade on the Highland Park side of the Raritan. There is no ruins or remnants today that would indicate that this really existed. And I've never seen a photo. But it would serve as a much needed connection for 2 county parks if it hadn't been developed. 

How many pedestrian linkages have we lost over the years?