Switzerland's most popular railway route, which makes it no less interesting. The Glacier Express is also known as the slowest in the world. In this case, this is only a plus, you will have time to enjoy the mountain landscape from the panoramic windows. The route connects the ski resorts of Zermatt and St. Moritz. So, if you go in the winter, do not forget to take your skis. There are many well-known locations: Landwasser Viaduct, (similar to the one from the Harry Potter films), the Matterhorn Mountain, which is depicted on the logo of Swiss chocolate Toblerone.