3.Guoliang Tunnel Road, China（中国郭亮隧道）
Guoliang Tunnel is one of the most famous tunnels in the world. It’s 1.2 kilometres (0.75 mi) long, 5 metres (16 ft) tall and 4 metres (13 ft) wide, located high in the Taihang Mountains of the Henan Province, China.
The tunnel links the village of Guoliang to the outside through the Taihang Mountains which are situated in the Huixian, Xinxiang, Henan Province of China.
Before 1972, access to the nearby Guoliang village was limited to a very difficult path carved into the mountainside. The village was nestled in a valley surrounded by towering mountains. It was basically cut off from civilization. In 1972, a group of desperate villagers decided to take matters into their own hands – they would carve a road right into the side of the mountain by themselves.
It took five years to complete, and a few villagers died, in accidents, during the construction.