A beautiful sea of clouds appeared due to continuous rainfall within the Tianmen Mountain National Forest Park in Zhangjiajie City, central China's Hunan Province.
Tianmen Cave, or Heaven's Gate, is a natural, water-eroded cave. Clouds and mist constantly crossed through the gate, creating a spectacle for visitors. As the highest elevated cave of its kind in the world, it is one of the park's highlights.
(Cover image via VCG)
(If you want to contribute and have specific expertise, please contact us at email@example.com.)