Glacier Express

Billed as Europe's slowest express, the narrow-gauge Glacier Express links St Moritz in the Engadin skiing area and Zermatt at the foot of the Matterhorn, taking 7½ hours to cover just over 290 km (180 miles) at an average speed of 24 mph. https://www.seat61.com/trains-and-routes/glacier-express.htm

Switzerland