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.
Will the tunnel cut travel times from Germany to Denmark?
The tunnel, officially called the Fehmarnbelt Fixed Link, will have two double-lane motorways and two electrified rail tracks.
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.