Maybe that's because it's also one of the world's steepest roads, chiseled into the mountain by local villagers. The Guoliang Tunnel is located in the Taihang Mountains in China's Henan Province ...

In the remote Taihang Mountains of Henan Province, China, the Guoliang Tunnel has gained notoriety as one of the world's most perilous roads. Built by 13 villagers in the 1970s, the tunnel's steep ...