April 27, 2025

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The Record-Breaking Tunnel Being Built from Denmark to Germany
Construction is underway on the Fehmarnbelt Tunnel, a groundbreaking 18km immersed road and rail tunnel linking Denmark and Germany beneath the Baltic Sea. Once complete in 2029, it will be the world’s longest tunnel of its type, slashing travel times between Hamburg and Copenhagen, boosting freight links, and creating new opportunities for the region. With a €7.4 billion investment largely funded by Denmark and the EU, the tunnel aims to be a cornerstone of greener, faster European transport infrastructure.