[Hugin]

Stalin also tried to build a canal from the Baltic to the Black Sea. He sent hundreds of thousands to die, digging in frozen ground, often without tools. In the end there was nothing but a big weed choked ditch.

[rebooted]

Then there is the White Sea - Baltic Sea canal built by hand with prisoner slaves at a cost of 100,000 lives. Of little use because it's not deep enough for ships, being about 12 feet deep. (Imagine the world in the 30s with Hitler, Stalin, Mussolini, Mao, and the Japanese generals).