A station in the Pyrenees mountains that was once the second largest in Europe, lies abandoned at the border between France and Spain; the railway line that ran through it set the stage for tales of espionage, Nazi gold and the fight against tyranny.

Europe's longest rail network, the Harz Mountain Railway in Germany, still uses steam locomotives; its past is scarred with haunting secrets, including tales of witches, human suffering and a top-secret Nazi weapons programme.

Discovering a century-old story of the White Pass and Yukon Railroad and how it transported the prospectors of the Klondike gold rush; this remote railway changed lives of those who came in search of the American dream.

Looking at the story of the Nordland Line, the longest in Norway and stretching between Trondheim and Bodo; a nearby fjord houses the wrecks of Nazi destroyers and Allied ships, testimonial to the line's crucial role during WWII.

Looking at the story of the Liverpool and Manchester Railway, which revolutionized rail travel, including the first signalling system; looking at its history, where tragedy struck on its maiden voyage.

The story of the Tablelands Railway Line in Queensland, running through the Australian rainforest, carrying tourists on its journey among ancient trees, mountains and waterfalls; this line has a hidden story that links it with the Pacific War.