The Gotthard Base Tunnel is an engineering marvel, holding the title as the world's longest and deepest railway tunnel - but ...

If so, Eurotunnel’s ‘Le Shuttle’ train service is the quickest way to cross the English Channel ... what you need to know ...

The hypothetical tunnel between the U.S. and the UK has been branded as a "high-risk" project by one of the world's leading megaprojects economists.