The train most similar to the Glacier Express in terms of scenery and luxury is the Bernina Express, also operated primarily by the Rhaetian Railway in Switzerland. While the Glacier Express is known as the "World's Slowest Express Train" connecting Zermatt and St. Moritz, the Bernina Express runs from Chur or St. Moritz down to Tirano, Italy. Both trains feature panoramic glass carriages designed to give riders unobstructed views of the Alps. The Bernina Express is slightly more dramatic in its elevation changes, famously crossing the Landwasser Viaduct and the Brusio Spiral Viaduct, which is a UNESCO World Heritage site. Another comparable option is the GoldenPass Express, which connects Montreux to Interlaken and recently introduced "Prestige Class" seats that can rotate and heat. If you are looking for a similar experience outside of Switzerland, the Rocky Mountaineer in Canada offers a comparable level of luxury and panoramic sightseeing, focusing on the breathtaking peaks and rivers of the Canadian Rockies, though it operates as a multi-day hotel-inclusive tour rather than a point-to-point transit service.