The Rhaetian Railway, abbreviated RhB, is a Swiss transport company that owns the largest network of all private railway operators in Switzerland.
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.

www.rhb.ch - 2791 - Rhaetian Railway