The Albula Tunnel, the second longest on the Glacier Express line that cuts through the Swiss Alps, was opened in 1903. As a result, it's badly in need of renovation - and engineers have an ambitious solution.
It is one of the most famous trains on Earth and is built for tackling steep mountains every day. Take a height-defying ride aboard the Glacier Express and discover the time-honored technology and amazing engineering that make it one of the planet's mightiest trains. Then witness all of the spectacular geography this train fits into one eight-hour shift, from the base of the Matterhorn to the Rhone valley, from the Furka Tunnel to the Oberalp Pass, and from the Rhine gorge to the Landwasser Viaduct.
Watch this episode online now.
Stream hundreds of shows by starting your free trial to Smithsonian Channel Plus.
Access even more free Smithsonian Channel full episodes and documentaries online through participating TV providers.
Find out if your television provider carries Smithsonian Channel.
Don't panic! It's simple to upgrade to the latest version of one of these browsers:
Don't panic! To get the best possible experience on smithsonianchannel.com we recommend you upgrade your operating system.
For the best possible site experience, please use Chrome for Android.
Add username "SmithsonianChan" on Snapchat for fun and fascinating facts. We'll be sharing spontaneous photos and videos as inspiration strikes.