The Albula railway line is part of the RhB UNESCO World Heritage site Albula/Bernina since 2008. The line was completed in 1903 to connect the Upper Engadine to facilitate international tourism and is tourist attraction in its own right. Renowned professional engineers were called upon for the construction of the Albula line (Thusis - St. Moritz). The track routing and all engineering constructions were built according to standards that represented the most progressive practices of mountain railway construction. The Albula railway was designed as a classic mountain railway for steam locomotives. Its track routing and engineering structures made out of local quarry stone were the highlight of the classical period of railway construction. The Albula line was electrified with 11000 V AC 16,7 Hz in 1919 already, more then 100 years ago. The most spectacular section is between Bergün and Preda, with open loops, loop and spiral tunnels and many viaducts. On this photo compilation, the Interregio 1145 from Chur to St.Moritz, pulled by the locomotive Ge 4/4 III # 644 "Savognin", can be seen three times on the section between the service station Muot (1575 m a.s.l.) and Preda (1789 m a.s.l.). During 2 minutes and 45 seconds, the train climbs 80 metres in altitude with a gradient of 3.5 % through the 677-metre-long Toua spiral tunnel, over the 138-metre-long Albula III viaduct, through the Maliera Gallery in a loop and finally through the 535-metre-long Zuondra spiral tunnel. On the far left is the Albula II viaduct visible. The picture was shot from the Fallò mountain on about 2100 m a.s.l., about 1 1/2 hours hike from Preda, not with a drone!
