The Rhätische Bahn Ge 6/6^II 707 seen hauling a freight train between Alvaneu and Filisur on the Schmittentobelviadukt

The main appeal of the Albula Railway is the freight traffic on many beautiful bridges. This twin-section locomotive is special in that it can only adjust vertical curves, not horizontal ones, though the middle bogie of the three can move sideways of course. Quite different from most twin-section locomotives .