This is one of my favorite photos I've ever taken. I've returned to this project several times, and this is the best angle and most beautiful setup. You might be wondering what those lines are in the middle. Those are lights on a ship coming through. If you're not familiar with long exposure shots, it's basically when a photography leaves the shutter open for an extended time. All motion is blurred. Any moving object will streak in the frame, while anything remaining still will still be in perfect focus.
"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. he span began life as an extremely rare transporter bridge — the first of just two such bridges ever constructed in the United States. Originally built in 1905, the bridge was upgraded in 1929–30 to a vertical lift bridge, which is rather uncommon, (although there are six such bridges along Ontario's Welland Canal), 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."