Philippe Gougler leaves for a trip to Slovenia, a small European country wedged between sea and mountains. And what better way to discover this little-known country than by train? To begin, he boards a small mine train which will take him under the mountains to discover sunken tunnels. There are also everyday trains, and the more unusual ones, which climb the mountains with cars on board as well as auto-trains which run on railway tracks dating from the Austro-Hungarian era.