The World's Most Interesting Borders: A Journey Through the Weird and Wonderful

6. France and the UK

The Channel Tunnel is the border. Gross Domestic Product: $3.049 trillion (France) or $3.332 trillion (UK)*; Area: 50.45 km*; Estimated An engineering wonder, the Channel Tunnel spans the English Channel at the Strait of Dover to link the United Kingdom with France. When the 50.45-kilometre tunnel was finished in 1994, it was a powerful symbol of European cooperation and togetherness, in addition to being a notable engineering achievement. France and the UK ©Billy69150/Museum It allows seamless movement of people, products, and ideas between the UK and continental Europe. It is the longest underwater tunnel portion in the world. The tunnel represents the potential for infrastructure to span nations and promote interconnection in an increasingly globalised society, and it has been instrumental in transforming economic, cultural, and social contacts across the border.