Duluth, Minnesota Lakes Waterway and the Saint Lawrence Seaway. Duluth forms a metropolitan area with neighboring Superior, Wisconsin, called the Twin Ports. The cities share the Duluth–Superior harbor and together are the Great Lakes' largest port, transporting coal, iron ore (taconite), and grain. A tourist destination for the Midwest, Duluth features the United States' only all-freshwater aquarium, the Great Lakes Aquarium; the Aerial Lift Bridge, which spans the Duluth Ship Canal into the Duluth–Superior Harbor; and Minnesota Point (known locally as Park Point), the world's longest freshwater baymouth bar, spanning . The city is also the starting point for vehicle trips along
Lake Superior and Mississippi Railroad Lake Superior and Mississippi Railroad The Lake Superior and Mississippi Railroad is the name for two different railroads in Minnesota. The Lake Superior and Mississippi Railroad (LS&M) was the first rail link between the Twin Cities and Duluth and came into existence in 1863 when financier Jay Cooke selected Duluth as the northern end of a new railroad. Lyman Dayton, a local businessman put up $10,000 of his own money to do the original surveying work and served as the railroad's president until his death in 1865. Dayton was succeeded as president by Frank Hamilton Clark, a Philadelphia banker whose