Denmark and Germany will soon be linked by an 18-kilometre-long underwater tunnel. The Fehmarnbelt Tunnel will be the longest combined rail and road tunnel anywhere in the world when it is completed in 2029.
This €10 billion project – which crosses a stretch of the Baltic Sea known as the Fehmarn Belt – will connect Rødbyhavn on the Danish island of Lolland and Puttgarden in northern Germany.
The journey through it will take seven minutes by train and 10 minutes by car, avoiding a 160 kilometre detour across the Danish mainland. Rail travel times from Hamburg in Germany to Copenhagen in Demark will be cut from around five hours to less than three.