Guoliang Tunnel Road, China（中國郭亮隧道）

The Guoliang Tunnel Road was built in the Taihang Mountains of China's Henan province by 13 neighboring villages. It took five years to complete, and a few villagers died, in accidents, during the construction. The road is 1.3 kilometers (0.81 miles) long, 12 feet wide and 15 feet high, which makes the road extremely scary. The tunnel has 30 windows that allow drivers to enjoy the spectacular view of the Taihang Mountain. The mountain is known as "the long corridor in cliffs."