The Kiel Canal, one of Europe's most vital shipping waterways, shut down after two neglected locks finally gave up the ghost. It's the world's most heavily trafficked man-made shipping lane, but since Wednesday few ships have been seen on the 100-kilometer (62-mile) long Kiel Canal, which cuts through the northern German state of Schleswig-Holstein to form a roughly 450-kilometer shortcut between the North and Baltic Seas, reports Spiegel Online International. Although the canal is under the jurisdiction of the federal government…