The U-boat was spotted for the first time by amateur scuba divers in late January and they had contacted the authorities. Archaeologists associated with Niagara University of and master divers from the U.S Coast Guard were mobilized on site to determine what it was, and they soon realized that they were dealing with a German submarine that sank during World War II.
A wreck recovery vessel of the Great Lakes Shipwreck Historical Society was mandated to refloat the ship and bring it back to Niagara Falls, where it must be restored before becoming a museum ship. The delicate recovery operation took nearly 30 hours to complete, but the submarine was finally brought down on the bank with relative ease.
Read the rest, and see the pretty pictures here :