Arguably the slowest ‘express’ on the planet, the 180 mile ride on this delightful route takes a good 8 hours. Not that we are complaining about the pace as this offers you loads of time to catch a glimpse of the magical panorama that lies on its path, which links the two mountain resorts of St. Moritz and Zermatt in the Swiss Alps. 291 bridges, 91 tunnels and an altitude of 6,670 feet make this train ride similar to an expedition through fairyland.