The Glacier Express is a train service that connects St. Mortiz and Zermatt in the Swiss Alps. It is operated by Matterhorn Gotthard Bahn (MGB) and Rhaetian Railway (RhB).
The Glacier Express is a scenic route, known for being the slowest express train in the world. The full journey takes around seven and a half hours, and crosses 291 bridges, and travels through 91 tunnels. It is a narrow gauge service, and a large number of rack-and-pinion systems are used to travel up/down steep slopes.