Hamburg
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.
Abandoned tunnel in Brussels
At the end of the nineteenth century, a viaduct was constructed under one of the many access roads to the centre of Brussels for a road that has been removed from all street atlases today.
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Antwerp
The Belgian Rupel region has over fifty brickmakers' tunnels running under streets and railway lines. They are the best-hidden reminder of the brick industry of yesteryear.
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