The Channel Tunnel is a 50.5 km rail tunnel linking Folkestone, Kent, in the United Kingdom, with Coquelles, Pas-de-Calais, near Calais in northern France, beneath the English Channel at the Strait of Dover. At 37.9 km the tunnel has the longest undersea portion of any tunnel in the world.

The great engineering achievements of the modern world are more than purely functional. The visionaries who dreamed up their imposing shapes used art and science to create structures of dramatic beauty. Our bridges, dams, and skyscrapers, dominate our landscapes, as the pyramids dominated those of ancient Egypt. They're testaments to the creative genius of humankind.

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