Atlas Obscura
Drammen Spiral in Drammen, Norway
There are plenty of scenic roads that lead up mountains. What is decidedly less common is a road tunnel that ascends inside the mountain, such as the Drammen Spiral in Norway. Shaped like many parking garage ramps, it rises over 130 meters in a helix shape found nowhere else in the world. (Although there are other loop tunnels, none have two loops on top of each other, much less six!) Capped at…
road tunnel that ascends inside the mountain in a helix