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
Manistique and Lake Superior Railroad Manistique and Lake Superior Railroad The Manistique and Lake Superior Railroad (M&LS) was an American Class III railroad serving the Upper Peninsula of Michigan from 1909 to 1968. It provided service from Manistique, Michigan to a junction with the Duluth, South Shore and Atlantic Railway at Doty, Michigan, southeast of Munising, Michigan. Its nickname was "The Haywire". The M&LS was chartered in 1909 to penetrate what was then a booming lumber and pulpwood region of the central Upper Peninsula. Almost from the start, it served as an affiliate of the Ann Arbor Railroad and was connected with the larger railroad's