Not everyone who nowadays drives on the A73 between Nuremberg and Bamberg knows that they are travelling on a former waterway. Still half a century ago, the old Ludwig-Main-Danube-Canal (in short: Ludwig-Canal) was located here, which represented the last puzzle piece to a navigable connection between the oceans. Build within a remarkable ten years’ time of construction, the canal, which was opened in 1846, was the realization of a small dream of humanity as it finally connected the North Sea with the Black Sea. Unfortunately, the idea could...