(Reuters) - A time exposure photograph shows a tree in front of the snow covered Bernese alps and the city of Thun (L) in Oberbuetschel, near Bern, November 30, 2010. A large part of Switzerland was hit by a cold wave in the last days with snow falls and below-zero temperatures. REUTERS/Michael Buholzer (SWITZERLAND - Tags: ENVIRONMENT SOCIETY IMAGES OF THE DAY)