Building a railway through “the roof of the world” (Tibet).
- A clever low-low-tech solution to the problem of ground’s freezing & thawing messing up your hard structure. (Also a clever low-tech, but not low-low-tech solution.)
- Specific numbers that matter a lot: how many days do you need to stop at what altitudes on your way up to work at 5000 metres (15,000 feet) above sea level?
National Geographic:-Megastructures-Extreme Railway (por Simon Peter)