The Channel Tunnel (also referred to as the Chunnel) is a 31.4 mi 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.
Built by Brazil and Paraguay on the Paraná River, the Itaipu dam is the world's largest hydroelectric power plant. Completed in 1991, it took 16 years to build this series of dams whose length totals 7,744 m. It used 15 times more concrete than the Channel Tunnel, which connects England and France
THE CHANNEL TUNNEL (French: Le tunnel sous la Manche; also referred to as the Chunnel) is a 50.5-kilometre (31.4 mi) 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 75 m (250 ft) deep. (en.wikipedia.org)
A migrant jumps out from the rear of a truck as a French CRS riot police stand near after he failed in his attempt to make a clandestine crossing to England through the Channel tunnel in Calais, May 22, 2015. REUTERS/Pascal Rossignol
Visiting the Nazi Second World War tunnels in Jersey in the Channel Islands, UK. These are quite scary tunnels to visit, showing some of the hospital rooms and the terrible conditions of workers having to dig the tunnels. They also tell the history of the Channel Islands under Hitler's rule and the harsh lives they had to endure. Read more by clicking the photo above.