> Danube to Mediterranean canal For the curious, it'd follow a river in Serbia and connect to a river in North Macedonia. Approximately 100 kilometres apart, a

> Danube to Mediterranean canal For the curious, it'd follow a river in Serbia and connect to a river in North Macedonia. Approximately 100 kilometres apart, assuming a straight line. That means about half the length of Suez (193 kilometres) and slightly longer than the length of the Panama canal (82 kilometres), though I'm assuming riverbeds would have to be expanded in some places.