The Guoliang Tunnel Road is a unique and remarkable feat of engineering located in the Taihang Mountains of China. The tunnel was carved into the side of a mountain by a small group of villagers from the nearby village of Guoliang. The tunnel is 1.2 km long, 5
From Wikipedia
The Guoliang Tunnel (Chinese: 郭亮洞) is carved along the side of and through a mountain in China. The tunnel links the village of Guoliang to the outside through the Taihang Mountains which are situated in Huixian, Xinxiang, Henan Province of China.