HUNAN, September 7, China.org.cn -- Tianmen ("Heavenly Gate") Mountain National Forest Park lies only 8 kilometers south of the city of Zhangjiajie.Tianmen Mountain National Forest Park is characterized by large, limestone mountain tablelands with sheer cliffs and with a fair share of jagged peaks.

thumb Forest Industry - 9.9 Tianmen Mountain National Forest Park in Zhangjiajie

People walk on a glass corridor at the Tianmen Mountain National Forest Park in Zhangjiajie, central China's Hunan Province, Sept. 7, 2016. (Xinhua/Long Hongtao)