THE world's biggest underwater "Lego tunnel" will soon be dunked into the ocean to create a bustling connection between Denmark and Germany. The $7billion mega-project will install a sub-aquatic ...

After decades of discussion, an underwater tunnel linking Spain with Morocco looked like it would finally be built before the 2030 World Cup. The Moroccan National Company for Strait Studies (SNED ...

An underwater rail tunnel could slash the travel time between Madrid and Casablanca to just five and a half hours, a significant improvement on the current twelve-hour car journey. In 1979 ...

Engineers around the world are increasingly exploring the idea of connecting countries through underwater tunnels, making travel faster and more efficient. One ambitious proposal is a tunnel ...