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The Channel Tunnel (; also referred to as the Chunnel ) is a undersea 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 its lowest point, it is deep.
At, the Channel Tunnel possesses the longest undersea portion of any tunnel in the world, although the Seikan Tunnel in Japan is both longer overall at and deeper at below sea level.
In 1996 the American Society of Civil Engineers identified the tunnel as one of the Seven Wonders of the Modern World.

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