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
Duluth, Minnesota the Depot downtown and ceramic and multi-purpose studios in the Lincoln Park neighborhood. A number of local art galleries are also located downtown and in Canal Park. The Duluth Public Library has three locations. Duluth is also home to a professional ballet company, the Minnesota Ballet. Duluth shares a symphony orchestra—the Duluth Superior Symphony Orchestra—with Superior, Wisconsin. In summer free concerts are often held in Chester Park, where local musicians play for crowds. The Bayfront Blues Festival is held in early August. Duluth is home to several local theater companies, including The Duluth Playhouse, one of the oldest operating community