For over 600 years, Guoliang village in central China's Henan province has been overlooking a mountain of stone and steep cliffs at an altitude of 1,700 meters.

Villagers had to rely on the 720 almost-vertical stairs to get to the world outside, until one day they decided that they have had enough of it.

With bare hands, shovels, and hammers, 13 men from the village spent five years to carve a tunnel out of the stone walls of the 200-meter cliff. It is hard to imagine how they did it without electricity or machine, but since then, the village has a much more covenient and safer way getting to the world outside.

The village and its unimaginable carvel tunnel on the cliff was not known to people until recently, when the heat of tourism reached the village.