Aerial photo shows the scenery of sea of clouds in Tianzi Mountain of Zhangjiajie, Central China's Hunan province.

It is said that nature is at its most creative in Zhangjiajie, the first national forest park that China established in the northwestern part of Hunan province. Its bizarre-shaped rock mountains, forbidding deep canyons and powerful waterfalls form ever changing scenery due to the varied climates. The forest park was put on UNESCO's list of world natural heritage sites in 1992 for its geological and tourism value. [China.org.cn]