Engine driver Ursin Nett enters a Zaugg snowblower used to remove snow from the tracks of the Rhaetische Bahn Bernina line railways at the southern Swiss Bernina mountain pass (2256 meters/7403 ft) January 29, 2013. The 'Rhaetian Railway and the Albula/Bernina Landscape' site are protected by the UNESCO World Heritage List. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: TRAVEL ENVIRONMENT)