40 impressive photos of Aerial Lift Bridge in Duluth, Monnesota

The Aerial Lift Bridge (earlier known as the Aerial Bridge or Aerial Ferry Bridge) is a major landmark in the port city of Duluth, Minnesota. The span began life as an extremely rare transporter bridge — the first of just two such bridges ever constructed in the United States.[2] Originally built in 1905, the bridge was upgraded in 1929–30 to a vertical lift bridge, which is rather uncommon, and continues to operate today. The bridge was added to the National Register of Historic Places on May 22, 1973. A maritime museum maintained by the United States Army Corps of Engineers exists near the site of the bridge.