The Guoliang Tunnel connecting the clifftop village of Guoliang, in China’s Henan province, to the outside world was carved by hand using basic tools like chisels and hammers, and is now referred to as the eight wonder of the world.
For centuries, the people of Guoliang, a small Chinese village perched atop a cliff in the Taihang Mountains, were virtually cut off from the outside world. The only way in and out of the village was the “Sky Ladder,” 720 steps carved into the mountains during the Song Dynasty (960-1279). This made it extremely hard to get things in and out of the village, so most of the 300 or so inhabitants considered moving away in search of a better, easier life. However, everything changed in 1972, when the village council decided to carve a tunnel through the mountains to finally connect Guoliang to the outside world.
