https://en.wikipedia.org/wiki/Rhaetian_Railway

The Rhaetian Railway (German: Rhätische Bahn; Italian: Ferrovia Retica; Romansh: Viafier Retica), abbreviated RhB, is a Swiss transport company that owns the largest network of all private railway operators in Switzerland. The RhB operates all the railway lines of the Swiss canton of Grisons, except for the line from Sargans to the cantonal capital, Chur, which are operated by Swiss Federal Railways (SBB CFF FFS), as well as the line from Disentis/Mustér to the Oberalp Pass and further on to Andermatt, Uri, which is operated by Matterhorn Gotthard Bahn (MGB). Inaugurated in 1888 and expanded from 1896 onwards in various sections, the RhB network is located almost entirely within Grisons, with one station across the Italian border at Tirano.

The Rhaetian Railway serves a number of major tourist destinations, such as St. Moritz and Davos. One of the RhB lines, the Bernina Railway, crosses the Bernina Pass at 2,253 metres (7,392 ft) above sea level and runs down to Tirano, Lombardy in Italy.

In 2008, the RhB section from the Albula/Bernina area (the part from Thusis to Tirano, including St. Moritz) was added to the list of UNESCO World Heritage Sites. The Albula-Bernina line is the first rail line in the world to be photographed and put on Google Street View. The company also operates several historic trains on the network.