Stretching 18 km between Denmark and Germany, this €7bn immersed tunnel is the world’s longest road and rail link. By 2029, it will replace a 45-minute ferry trip with a 10-minute drive or a 7-minute ...

The Fehmarnbelt Tunnel is one of those infrastructure projects that sounds almost futuristic the first time you hear about it. When it opens later this decade, drivers and train passengers will be ...