Inside the other Channel Tunnel you don't normally see
It was opened in May 1994. The tunnel is a 50.45 kilometres long. It links linking Folkestone, Kent, in the United Kingdom, with Coquelles, Pas-de-Calais, near Calais in northern France. The tunnel leads beneath the English Channel at the Strait of Dover. At its lowest point, it is 75 m deep below the sea bed.