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
St. Mary's/Duluth Clinic Health System partnership between the Benedictine Health System and SMDC. In 2010, Essentia Health integrated the resources of all of its various member organizations and united them under the one name, Essentia Health, and SMDC Health System ceased to exist. St. Mary's/Duluth Clinic Health System SMDC Health System (St. Mary's/Duluth Clinic Health System) was a former hospital network with hospitals and clinics in northeastern Minnesota and northwestern Wisconsin and also serving parts of Michigan’s Upper Peninsula. The four hospitals were St. Mary’s Medical Center in Duluth, Minnesota, SMDC Medical Center in Duluth, St. Mary’s Hospital of Superior, Wisconsin and Pine Medical Center