Kiel Canal
The Kiel Canal (Nord-Ostsee-Kanal) is the world busiest artificial waterway, connecting the North Sea to the Baltic Sea across 98 kilometers through Schleswig-Holstein. Built from 1887-1895, this engineering marvel handles 32,000 ships annually, saving vessels 460km by avoiding the storm-prone route around Denmark. The canal features massive locks accommodating ships up to 235 meters long and serves as a crucial strategic shipping route for international maritime trade.