On the shores of the Baltic Sea, in the south of Denmark, a vast engineering marvel is taking shape — piece by giant concrete piece — that, when finished, will drastically redraw the road and ...

Descending up to 40 meters beneath the Baltic Sea, the world’s longest immersed tunnel will link Denmark and Germany, slashing journey times between the two countries when it opens in 2029.

On the shores of the Baltic Sea, in the south of Denmark, a vast engineering marvel is taking shape — piece by giant concrete piece — that, when finished, will drastically redraw the road and ...