This video explores the construction of the Fehmarnbelt Tunnel, an 18 km long underwater tunnel in the Baltic Sea that has ...

The world’s longest and deepest undersea road tunnel is being built in Norway, intended to cut travel time between major cities and become part of a ferry-free highway along its western coast.

The Fehmarn Belt Fixed Link will soon join Denmark and Germany through an 18-kilometer immersed tunnel beneath the Baltic Sea ...

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 ...

Connecting Europe and Africa across the Strait of Gibraltar remains a dream. Engineers have explored bridges and tunnels for ...