If asked which underwater tunnel in the world was longest, you’d be pardoned for proposing the Channel Tunnel, located between the UK and France, which is an admirable 31 miles long. But ...

The first part of a massive multi-billion 11-mile underwater ... other two tunnels which are longer, but only allow road traffic, are the Channel Tunnel (23.6 miles) which connects England and ...

For scale, consider the Channel Tunnel a fairly modest 23.5 miles under the English Channel that joins England with France ... it was reported that a new underwater tunnel could connect Spain ...

It was the longest underwater tunnel in the world until 1987 and, for more than 100 years, it was the longest mainline railway tunnel in the UK. But to keep it operational and reducing delays is a ...

An ambitious £6bn underwater tunnel that would link Africa to Spain is gaining momentum. The incredible plan of connecting Europe and Africa under the waters of the Strait of Gibraltar has been a ...