2. Guoliang Tunnel, China This tunnel is carved along the side of a mountain penetrating it. This deadly road took 5 years to complete.
It is known as ‘The Long Corridor in Cliffs'. It is a meager 1.3 kilometers but you would wish this journey ended in 1.3 seconds.
It is only 12 feet wide and can scary the crap out of the driver. It is compulsory to keep headlights on and drive at a slow pace.