In Peenemünde, Germany, the Nazi rocket testing center, a coal-fired power plant was established in 1939 to enable the energy-intensive production of liquid oxygen - the fuel for the V2 rocket.
Until the eleventh century, Duisburg was located directly on the Rhine, but after the river's course changed, the Hanseatic city lost its most important asset. Traders left, and Duisburg was taken over by farmers and monks.
In 1911, the St. Pauli-Elbtunnel was the technical sensation of the moment because it was the first substantial underwater tunnel on the European mainland.
The cobblestone section from Wallers to Hélesmes plays a starring role every year in Paris-Roubaix. But until a hundred years ago, wagons packed with coal thundered above the cobblestone strip.
After the First World War, the German army left dozens of bunkers behind in the French Illies, a village about 20 kilometers west of Lille.
With its three coal mines, the German city of Herten was, for a long time, the largest mining city in Europe. Schlägel Eisen is one of the mines that can still be found there.
With the dynamiting of the two blast furnaces of the Usine de Senelle, the last witnesses of the steel basin in Longwy, France, disappeared in the summer of 1991. Or almost.
Only a dozen pylons remain of the cable car between the iron mine in Öttingen, France and the blast furnaces of Terres Rouges in Differdange, Luxembourg.
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While infrastructure is crucial for any country's smooth functioning, Belgium boasts some examples of construction that leave locals and tourists scratching their heads, like useless tunnels, bridges, and dead-end roads.
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