When marine ships were smaller, this was the connection point where they moved between the Great Lakes. Lake Huron and Lake Superior are different depths, and the locks are like a water elevator that allowed ships to move between the two. Think of it as a man-made replacement for a waterfall, where a ship can move in either direction. As a spectator standing at the top of the locks, visitors are at the level of Lake Superior looking down at Lake Huron while steel doors hold back all the water…
