Photo taken on Sept. 18, 2007 shows tourists walking in the forest of Arxan of north China's Inner Mongolia Autonomous Region. Arxan in southwest of the Greater Hinggan Mountains, in which the biggest national volcano spring geopark in China is located, has the most beautiful scenery with colorful forests and blue sky in Autumn. Over 15, 000 tourists and photographers visited Arxan during last Autumn, according to local tourism department. (Xinhua/Li Xin)
Photo taken on Sept. 17, 2007 shows autumn scenery of the Halha River in Arxan of north China's Inner Mongolia Autonomous Region. (Xinhua/Li Xin)
Tourists buy souvenir in Arxan of north China's Inner Mongolia Autonomous Region on Sept. 18, 2007. (Xinhua/Li Xin)
Rangers patrol in Arxan of north China's Inner Mongolia Autonomous Region on Sept. 18, 2007. (Xinhua/Li Xin)
Tourists play near a spring river in Arxan of north China's Inner Mongolia Autonomous Region on Sept. 18, 2007. (Xinhua/Li Xin)
