A record-breaking tunnel is being built under the Baltic Sea between Denmark and Germany, which will slash travel times and improve Scandinavia’s links with the rest of Europe.

Running for 18km (11 miles), the Fehmarnbelt will be the world’s longest pre-fabricated road and rail tunnel.

It’s also a remarkable feat of engineering, that will see segments of the tunnel placed on top of the seafloor, and then joined together.

Once completed, the journey between Rødbyhavn in southern Denmark and Puttgarten in northern Germany, will take just 10 minutes by car, or seven minutes by train, replacing a 45-minute ferry voyage.

Bypassing western Denmark, the new rail route will also halve travel times between Copenhagen and Hamburg from five to 2.5 hours, and provide a “greener” shortcut for freight and passengers.