Switzerland is a country where natural beauty and efficient, comfortable train travel go hand in hand. Nowhere is this more apparent than on the Glacier Express, a traveler-favorite train that chugs along over 180 miles between Zermatt and St. Moritz. It may be deemed the "slowest express train in the world," but don't let that deter you-the route gives way to some of the most jaw-dropping scenery in Europe, especially in the winter.