The only land border Denmark shares with another country is its southern frontier with the German state of Schleswig-Holstein. This relatively short 68-kilometer line across the Jutland Peninsula has a complex and often contentious history, primarily concerning the sovereignty of the Schleswig and Holstein duchies, which were the subject of wars in the 19th century. Today, the border is a peaceful and open one. There is one main motorway crossing and several smaller rural crossings, all of which are completely open for passage under the Schengen Agreement. The crossing at Padborg/Harrislee is the primary artery for road traffic and commerce between Scandinavia and Central Europe.
Beyond the land border, numerous ferry routes create a “water border” across the Baltic Sea, connecting various Danish islands with German ports like Rostock and Puttgarden. These sea links are vital for trade and tourism. A lasting legacy of the region’s layered history is its officially recognized minority populations. A significant Danish minority lives in Germany’s South Schleswig, maintaining its own schools and cultural institutions, just as a German minority resides in Denmark’s North Schleswig. This reciprocal arrangement makes the border region a living example of successful cross-border cultural management.