Several thousand meters of vertical drop compress tropical to frigid ecosystems onto a single mountain — an ultimate three-dimensional ecological corridor where one mountain holds all four seasons.

Hengduan Mountains Sichuan / Yunnan

steep snowcapped ridges and deep gorges, alpine meadows covered in blooming wild rhododendron shrubs (杜鹃花), and a red panda (小熊猫) in a tree, illustrating vertical vegetation zones