The Glacier Express train is fitted with picture windows and glass skylights so passengers can admire the breathtaking scenery of the Swiss Alps along the panoramic route that winds through the cantons of Valais, Uri, and Graubunden. Much of its track runs along and through the UNESCO World Heritage Site known as the “Rhaetian Railway in the Albula/Bernina Landscapes.” On its 180-mile (290-kilometer) journey, the train makes five stops, passes under 91 tunnels, and goes over 291 bridges and viaducts; its highest point is the Oberalp Pass between Andermatt and Disentis, which sits at 6,667 feet (2,033 meters). You can take a one-way trip in a single day, or stop off at the towns along the way and stay overnight in Zermatt or St. Moritz for a three-day, round-trip journey. To fully appreciate the stunning landscape and easily manage your seat reservation and connections, book a Glacier Express tour and make the trip accompanied by a private guide.