This unique roadway connects the Danish capital of Copenhagen to the Swedish city of Malmö. The highway is, designed by the Danish architect George K.S. Rotne.
How it is made (short description) ?
To use this method, builders dig a trench in the riverbed or ocean floor. They then sink pre-made steel or concrete tubes in the trench. After the tubes are covered with a thick layer of rock, workers connect the sections of tubes and pump out any remaining water.
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