Wuyishan Pass
Wuyishan Pass is a high mountain pass at an elevation of 4.721m (15,488ft) above the sea level, located in western Sichuan Province, China.
The road to the summit, located within the Hengduan Mountains, is gravel, rocky, tippy and bumpy at times. It’s called 217 Provincial Road (S217). The road is usually impassable in winters. Great trail for experienced wheelers. Avoid driving in this area if unpaved mountain roads aren't your strong point. 4x4 required. Stay away if you're scared of heights. Expect a trail pretty steep. Wet conditions may make for tough driving along the muddy road. A masterpiece of Chinese road construction.
Pic: fsyzh [CC BY 3.0 (https://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons