Drammen Spiral is a spiral tunnel that rises through the mountain, with a total length of 1650 meters. The tunnel has a gradient of 10% and consists of six loops, with a diameter of 70 meters. The height between the floors is approximately 20 meters, and the roadway reaches a maximum height of approximately 4.5 meters. The width of the roadway is approximately 9 meters.
At Spiraltoppen, visitors can enjoy a fantastic view of the Drammensdalen valley. In addition to the impressive construction, there is a café at the top, which provides an opportunity to take a break and admire the surroundings. Drammen Spiral is a unique landmark that combines engineering with nature experiences.