Eider Canal Eider Canal The Eider Canal (also called the Schleswig-Holstein Canal) was an artificial waterway in southern Denmark (later northern Germany) which connected the North Sea with the Baltic Sea by way of the rivers Eider and Levensau. Constructed between 1777 and 1784, the Eider Canal was built to create a path for ships entering and exiting the Baltic that was shorter and less storm-prone than navigating around the Jutland peninsula. In the 1880s the canal was replaced by the enlarged Kiel Canal, which includes some of the Eider Canal's watercourse. The canal's watercourse followed the border between the duchies of
Baltic Sea watchtower, Börgerende Baltic Sea watchtower, Börgerende The Baltic Sea watchtower () in Börgerende is an old watchtower that belonged to the Coastal Brigade ("Grenzbrigade Küste") of the East German Border Troops. As a maritime border observation tower (of type BT 11) it belonged to a series of originally 27 towers of this type on the Baltic Sea coast of East Germany, of which two have survived. The other remaining tower is in Kühlungsborn. The tower is located right next to the beach. The East German border soldiers had the mission of observing shipping movements on the Baltic Sea and identifying escape attempts.