As soon as 2029, the Fehmarnbelt Tunnel which, at its deepest point, will be 131 feet under the Baltic Sea, will easily connect Germany and Denmark. At 11.1 miles long, it will be the longest immersed tunnel in the world.
The Fehmarnbelt Tunnel will span the Fehmarn Belt, a strait between the German island of Fehmarn and the Danish island of Lolland. It will give travelers an alternative to the ferry service that currently brings passengers from Puttgarden, Germany, to Rødby, Denmark. While the ferry takes 45 minutes, the tunnel would take only 10 minutes to traverse by car and seven minutes by electric train.
