Situated in Leqing, Wenzhou City in southeast Zhejiang Province, Yandang Mountain is one of the 10 most famous mountains in China. Yandang Mountain is believed to be about 120 million years old.

Yandang Mountain is a typical ancient volcano of the Cretaceous period, which began more than 140 million years ago. Over the past 20,000 years, the volcano in Yandang Mountain has had several dozen eruptions. The landscape on and around the mountain was formed by multiple eruptions, collapses and rises, and by erosion from water and weather. Yandang Mountain covers an area of 450 square kilometers; it has more than 500 tourist attractions in eight major scenic areas.[China.org.cn]