one-third of the century-old Rhaetian Railway (RhB), spans 122 km from Thusis, Switzerland, to Tirano, Italy, traversing 196 bridges, 55 tunnels, and 20 towns across alpine landscapes.
It is considered “high” (degree 4 out of 5) throughout the Valais, central Switzerland and parts of Graubünden, and “considerable” (degree 3 out of 5) in the rest of the Alpine arc and ...