The railway's other great engineering innovation awaits travelers beyond Fenchi Lake, between the Pingchena and Mt. Ali stations. Steep Mt. Ta offers no chance for a track to spiral up.
接著又將是阿里山鐵道的另一個重頭戲，在屏遮那站到阿里山之間，陡峭的山勢完全沒有多餘的空間可供火車迴旋爬昇，於是便以「之」字型曲折來回爬山。