Way back in 1673, the French Canadian explorer Louis Jolliet noticed that the land around present-day Chicago had “a very great and important advantage, which perhaps will hardly be believed.” The area, he foresaw, could become the great node of a huge continent, with the Great Lakes on one side and, just a few miles to the southwest, the Illinois River and the entire Mississippi Basin. Jolliet envisioned, rather hopefully, that connecting the two — and creating a water route from Lake Erie all the way to the Gulf of Mexico – would be as simple as building a canal through just “half a league of prairie.”