The 76-mile Bohai Strait Tunnel will cost over $30 billion and take up to 15 years to build, with 56 miles running underwater ...

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. The first ...

The world's longest tunnel that will slash a six-hour journey to just 40 minutes and cost more than £20billion to build has ...

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 rail ...

At 18 kilometers (11.2 miles), it’s nowhere near as long as the 50-kilometer (31-mile) Channel Tunnel, but in many other ways it’s bigger. The project will, in fact, be the world’s longest road and ...