Flanked by two powerful nations, the English Channel has long been one of the world's most important maritime passages. Yet for most of its history, crossing was a dangerous prospect. Engineers proposed numerous plans for spanning the gap, including a design for an underwater passage more than twice the length of any existing tunnel. Alex Gendler details the creation of the Channel Tunnel. [Directed by Studio Kimchi, narrated by Addison Anderson, music by Aurélien Vieira Lino].

Alex Gendler: How the world's longest underwater tunnel was built

How the world's longest underwater tunnel was built

The Channel Tunnel, a marvel of modern engineering, was born from centuries-old ideas, evolving through fears and innovations.

Advanced boring machines and the discovery of chalk marl beneath the seabed transformed the tunnel from dream to reality.

Uniting England and France, the Channel Tunnel stands as a testament to human ingenuity, overcoming obstacles and connecting cultures.