Located within the Tianmen Mountain National Park, in northwestern Hunan Province, China, the Tianmen Shan Big Gate Road (also called the Tianmen Winding Mountain Road) is 11 kilometres (6.8 mi) long from the bottom to the top. The highest point of the road is at 1.300m above sea level, and the lowest point is at 200m. The construction of the road took eight years, finishing in 2006.
Located in the northwest of Henan province, in China, Guoliang Tunnel is famous for its dangerous location and difficult construction. Built in the early 1970’s, it’s one of the most famous Chinese tunnel roads.