World’s Largest Underwater Tunnel : Building the Fehmarn Belt Tunnel
Learn how the Fehmarn Belt underwater tunnel is being constructed and improving European connectivity with cutting-edge ...
Smithsonian Magazine1y
Beneath a Mountain in Switzerland Lies the World’s Longest Shortcut
Wearing a red hard hat and carrying a backpack with an emergency oxygen tank, I’m sweating as I get a rare look at the newest wonder of the world—the 35.4-mile Gotthard Base Tunnel ...