An enormous, multi-billion dollar, 11-mile underwater tunnel that will link two European nations has started construction on its first segment.
If all goes according to plan, the German port of Puttgarden will be linked to the Danish town of Rödbyhavn by 2029.
It follows the June inauguration of the £5.5 billion project’s first milestone by King Frederik of Denmark.
The tunnel, which would accommodate both rail and automobile traffic, will be the world’s longest underwater route.
The project’s underwater portion, which will be 11 miles (18 kilometers), is the third-longest subterranean corridor exclusively for vehicle traffic.
The two other, lengthier tunnels that exclusively permit vehicle traffic are the Seikan Tunnel, which runs 14.5 miles between.
