A sea of clouds flows down the mountains and into Yuping, a picturesque village in Jingde County, east China's Anhui Province.
Usually, a sea of clouds forms in valleys or over seas in very stable air mass conditions such as in a temperature inversion. Humidity can then reach saturation and condensation leads to a very uniform cloud of fog.
(Cover image via screenshot. Video filmed by Zhu Yongbing.)
(If you have specific expertise and want to contribute, or if you have a topic of interest that you'd like to share with us, please email us at firstname.lastname@example.org.)