Duluth is a port city on Lake Superior in Minnesota. The waterfront Lakewalk trail passes along Canal Park, with views of the 1905 Aerial Lift Bridge. The landmark connects the city to the Park Point sandbar. The Great Lakes Aquarium includes salt- and freshwater animals. Housed in a former train depot, Lake Superior Railroad Museum features vintage locomotives. Glensheen is a 1908 mansion on a vast lakeside estate.