JIUZHAIGOU, CHINA: Visitors stroll along the plank trail beside the frozen waterfall at Jiuzhaigou (Nine-village valley) in the Aba Tibetan and Qiang Autonomous Prefecture in China’s southwestern province of Sichuan, 09 January 2006. The famous attraction tourism Jiuzhaigou Valley is known as the “fairyland on the Earth”, was listed by the World Heritage Council of UNESCO into the Catalogue of World Natural Heritages in 1992. AFP PHOTO/ LIU Jin (Photo credit should read LIU JIN/AFP/Getty Images)