Inside Europe's $15B "Impossible" Undersea Tunnel: How Britain and France Built It (Full Process)

Ten men died building a tunnel under the sea, and two crews still had to meet in the pitch dark without ever seeing each other coming. I've spent my whole working life around big tunnels, and the Channel Tunnel is still the one I can't quite believe got built. Two teams dug toward each other from England and France, more than twenty miles apart, through solid rock and total darkness, with no satellites to guide them. One wrong turn down there and the sea would break in and take the machines, the money, and the men. In this one I walk you through the full story of how they pulled it off. The strange rock they chose to dig through, the giant machines that built the tunnel as they crawled, the way they steered blind with a single beam of light, the moment the two sides finally met in the middle, and why some of those machines are still buried under the sea to this day. If you love the stories behind the greatest things we've ever built, subscribe and stick around. I've got a lot more of these coming. #ChannelTunnel #Engineering #Chunnel #Megaprojects #Documentary