How Europe is Building an 11-Mile Tunnel Under the Sea

Europe is building an 11-mile tunnel beneath the Fehmarnbelt between Denmark and Germany — but instead of boring through the seabed, engineers are constructing enormous concrete sections on land and sinking them into place underwater. This documentary explores why the tunnel is being built, how the construction works, and what it takes to create the world’s longest immersed tunnel. Disclaimer: This video was created with the assistance of AI tools. All visuals are AI-generated conceptual representations for educational and Entertainment purposes. This is an educational documentary based on open-source research.