Immediately behind the Alp Grüm station, the line winds in a tight 180° bend, and passes below Alp Grüm through the Upper Palü Gallery. In a further 180° bend, it heads through the Palü Tunnel and subsequently through the Lower Palü Gallery. A further four half circle loops follow, until the line reaches the Cavaglia station. Since about 2000, there has also been a new automatic passing loop, Stablini, between Alp Grüm and Cavaglia. It bisects a portion of the line that was previously prone to traffic delays. In zigzag fashion, the line continues from Cavaglia further down into the valley via Cadera to Privilasco. From there, the line leaves the tight bends behind, and, still at its maximum gradient, reaches the Poschiavo Valley. In Poschiavo it finally meets up once again with the Bernina Pass road.