Get a personal tour of Sault Ste Marie Michigan by checking out our video collection. Sault Ste. Marie is the oldest city in Michigan and among the oldest cities in the United States. Over the course of history, the flags of several sovereign nations have flown over the Sault. Get a glimpse of maritime history at the Soo Locks, where freighters, barges, tugboats and more traverse the 21-foot drop between Lake Superior and Lake Huron every day.