The Soo Locks are the locks at Sault (pronounced Soo) Saint Marie that let the boats travel between Lake Superior and Lake Huron in the St Mary's river. We intended to take the boat tour the afternoon of our first day but reached the docks 20 minutes too late. (Too much fun at the lighthouse I guess.) So we wandered over the the state park where there is an observation tower and happened upon a freighter traveling west using the Poe Lock. In the first photo if you look closely to the right of center you can barely see the words Canada Steamship Lines.
And thus ends day 1 of our UP adventure, a very good day.