A giant light installation of the flag of Switzerland, by Swiss artist Gerry Hofstetter, illuminates the north face of the Jungfrau mountain, in the Bernese Oberland January 1, 2012. The installation commemorates the 100-year anniversary of the Jungfrau railway, which first began operations in the year 1912. REUTERS/Markus Zimmermann (SWITZERLAND - Tags: SOCIETY ENTERTAINMENT ANNIVERSARY TRAVEL ENVIRONMENT)