How Switzerland Built the World's Longest Tunnel Through the Alps

Deep beneath the Swiss Alps, Switzerland built one of the most extraordinary engineering achievements in human history: the Gotthard Base Tunnel, a 57.1-kilometer railway tunnel that holds the record as the world's longest railway tunnel. But how did engineers manage to carve a railway through more than 2,000 meters of solid mountain rock? From massive tunnel boring machines and underground explosions to extreme heat, dangerous geological conditions, and millions of tons of excavated rock, this project pushed modern engineering to its limits. In this documentary, discover how Switzerland planned and constructed this incredible megaproject, the challenges thousands of workers faced deep beneath the Alps, and the advanced technology that makes it possible for high-speed passenger and freight trains to travel through the heart of the mountains. Explore the history, engineering, construction techniques, and remarkable achievements behind a tunnel that transformed transportation across Europe. How Switzerland Built the World's Longest Tunnel Through the Alps — the incredible story of engineering beneath the mountains. Subscribe for more documentaries about megaprojects, incredible engineering, massive infrastructure, and the world's greatest construction achievements. 0:00 The Engineering Marvel Beneath the Alps 0:40 Beyond the World's Longest Tunnel 2:06 From Steep Passes to Flat Routes 6:26 Attacking the Mountain from Every Side 14:04 What Happens to 28 Million Tons of Rock? 16:38 Safety Systems in the Deep Dark #GotthardBaseTunnel #Engineering #SwissAlps #MegaProjects #Megastructures #Infrastructure #EngineeringDocumentary #Construction