Here you can see the city, the river, the fjord and surrounding areas, with the mountains in Kongsberg and Numedal on the horizon.
The top of the spiral can be reached in several ways. There re paths from several locations in Drammen, or you can drive through the tunnel. The entrance is located behind the Hospital of Buskerud. At the entrance of the tunnel, there is a ticket machine to pay for the use and as a parking ticket to leave the car at the top. The place is the starting point for countless trails, including lit trails through Drammensmarka and there is a restaurant and recreation area with a view.
The city engineer Eivind Olsen gave the idea that the quarry, used to provide road construction with materials for Rosenkrantz Street and Bear Bjørnson street. It was opened when Drammen celebrated its 150th anniversary in 1961 by King Olav V. The tunnel is 1650 metres long, 9 metres wide and originally had a height of 3.1 metres but it was extended later. The rise is from 20 to 213 metres above sea level and each spiral has a 70 metre diameter and winds round six and a half times around the axis. 70,000 cubic metres of rock had been blasted out.