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 and is water. It is Minnesota's second-largest city by land area, surpassed only by Hibbing. Of its , , or 77.89%, is land and , or 22.11%, is water. Duluth's canal connects Lake Superior to the Duluth–Superior harbor and the Saint Louis River. It is spanned by the Aerial Lift Bridge, which connects Canal Park with Minnesota Point ("Park Point"). Minnesota Point is about 7 miles long, and when included with adjacent Wisconsin Point, which extends 3 miles from the city of Superior, Wisconsin, is the largest freshwater baymouth bar in the world at a total of 10 miles. Duluth's