From Tom and Jerry to Lennon and McCartney, some things work best as a duo.  Scenic Swiss rail journeys are no exception to this rule, and the Glacier Express is perfectly complemented by its equally stunning counterpart, the Bernina Express.  An equally unforgettable trip, the whole route is UNESCO World Heritage-listed; a nod to both the stunning alpine scenery and the sheer miracle of engineering that can be experienced.  The journey begins in either Chur or St Moritz in Eastern Switzerland, before heading over 196 bridges, through 55 tunnels and around a 360-degree spiral en-route to the small town of Tirano on the Italian border.  The 90-mile (144 km) journey takes 4 hours and, at its highest point of Ospizio Bernina, reaches an incredible 7,391 feet (2,253 m) above sea level before beginning its stunning descent.  With enormous panoramic windows enabling a perfect view of the beautiful landscape, it’s easy to see why the Bernina Express is a bucket-list experience for so many travelers.