A man skies down an artificial snow slope located just outside the Olympic Stadium, also known as the 'Bird's Nest', in Beijing December 19, 2010. The stadium, which has been rarely used since it held the 2008 Beijing Olympic Games, is now annually turned into a winter playground in an effort to attract more tourists during the quieter Christmas and Chinese New Year season. REUTERS/David Gray (CHINA - Tags: SOCIETY TRAVEL)