Stretching 18 km between Denmark and Germany, this €7bn immersed tunnel is the world’s longest road and rail link. By 2029, ...

The tunnel will stretch 17 miles at a maximum depth of 392 metres below sea level, which, compared to the Channel Tunnel, ...

Every day, long-haul truckers and commuters pass through the George Wallace Tunnel, briefly slipping away from daylight and 40 feet underwater, until reemerging into downtown Mobile, Alabama. Since ...

The tunnel connects two beautiful islands and is even longer than the Channel Tunnel.

Tunnels are used to carry traffic through some of the most extreme terrain on the planet and they help ease journeys with reduced travel time. While most tunnels offer a short underground burst of ...

Spain has begun investigating the possibility of connecting Europe to Africa via an underwater tunnel to Morocco. On Saturday, the Spanish government allocated €1.6 million (roughly $1.7 million) to a ...

This incredible project took five years and cost an eyewatering £2.5 billion to build.

AUSTIN, Texas — The Washburn Tunnel, which runs under the Houston Ship Channel and connects the cities of Galena Park with Pasadena, is the last remaining traffic tunnel in the entire state of Texas.