How China Built a Railway Across the Roof of the World

The Qinghai–Tibet Railway is one of the most extraordinary engineering projects ever built. Crossing vast stretches of the Tibetan Plateau at elevations above 4,000 meters, engineers faced extreme cold, frozen ground, thin air, and some of the most challenging construction conditions on Earth. Many experts believed a railway through this region was impossible. In this documentary, we explore how China built one of the world's highest railways, overcoming permafrost, harsh weather, remote terrain, and complex engineering obstacles to connect one of the most isolated regions on the planet. Discover: ✔ Why the railway was built ✔ The challenges of building on permafrost ✔ How engineers worked at extreme altitudes ✔ The technology used to protect the railway ✔ The impact on transportation and regional development If you enjoy mega projects, engineering documentaries, infrastructure, and construction stories, subscribe for more videos.