Thanks to Neatorama for the link, which we found so inspiringly frightening, we had to show our readers. The road shown here is the Guoliang Tunnel in Taihang mountains (China). It has been built by villagers themselves, which is an inspiring story in itself:
"Before 1972, the path chiseled into the rock used to be the only access linking the village with the outside world. Then the villagers decided to dig a tunnel through the rocky cliff. Led by Shen Mingxin, head of the village, they sold goats and herbs to buy hammers and steel tools. Thirteen strong villagers began the project. It took them five years to finish the 1,200-metre-long tunnel which is about 5 meters high and 4 meters wide. Some of the villagers even gave their lives to it. On May 1, 1977, the tunnel was opened to traffic."
The wall of the tunnel is uneven and there are more than 30 "windows" of different sizes and shapes. Some windows are round and some are square, and they range from dozens of metres long to standard-window-size. It is frightening to look down from the windows, where strange rocks hanging form the sheer cliff above and a seemingly bottomless pit lying below. A village, opposite the tunnel, appears to hang on the precipice.