The large structure built to connect England and France is the Channel Tunnel, also known as the Eurotunnel. This undersea rail tunnel stretches approximately 50.45 kilometers beneath the English Channel, linking Folkestone in England to Coquelles near Calais in France. Opened in 1994, the Channel Tunnel is a vital transportation link, enabling the efficient movement of people and goods between the two countries. It significantly reduces travel time compared to ferry services and has been a major contributor to regional trade and tourism. The tunnel showcases engineering innovation and international collaboration.