Europe is constructing the world’s longest underwater tunnel, the Fehmarn Belt Tunnel, which will connect Denmark and Germany. This ambitious €7.5 billion ($8.5 billion) project aims to enhance transport and trade across the region, significantly reducing travel time for cars and trains. The tunnel is being built using prefabricated sections that will be lowered into a seabed trench and sealed with durable rubber seals to ensure watertightness. However, delays have arisen due to the late delivery of specialized ships, putting the 2029 opening under pressure. Despite challenges, the project remains a vital part of the EU’s vision for faster rail travel and reduced reliance on short-haul flights.

This video summary was created by AI from the original DW script. It was edited by a journalist before publication.