Home Videos Germany and Denmark are building the world’s longest underwater rail and road tunnel | DW News Germany and Denmark are building the world’s longest underwater rail and road tunnel | DW News May 10, 2023 comments off Tweet on Twitter Share on Facebook Pinterest Baltic Sea denmark tunnel DW News fehmarn fehmarn belt fixed link fehmarnbelt tunnel femarnbelt tunnel femern a/s femern bælt germany tunnel longest tunnel tunnel construction site undersea tunnel underwater tunnel