The country's only Archimedes' screw can be found at the outlet of Arekilen on Kirkøy. The area is part of the Arekilen nature reserve, which is a popular destination for those interested in nature and culture. Here there is a rich and rather rare animal and plant life in a varied landscape, where hiking trails and swamp life go hand in hand. 

The Archimedes' screw at Hvaler is 6 meters long and 1 meter wide, and bears witness to a fascinating history where efforts are being made to combat malaria outbreaks & drain the wetland area to improve the nutritional base.

Late in the 19th century, the population in Norway was plagued by several outbreaks of malaria in areas that were close to brackish water areas. At Hvaler, there were also several larger eruptions at this time, which were eventually linked to various marsh areas, including Arekilen. It was therefore decided that an attempt should be made to dry out Arekilen, and in 1915 the Archimedes screw and a windmill arrived in the area, where the project of pumping water up from Arekilen was started. Not too long afterwards, unfortunately, the canal collapsed and the project turned out to be too expensive.

Volunteers tried for a long time to restore Archimedes' screw. The carpentry line at Greaker recreated a model in the 1980s, and in 2022 a larger reconstruction of the screw was shipped out. Over 650 hours of work have gone into recreating the Archimedes screw. 

The lookout tower is made according to the same principle as the old tower and today stands on the site of the old mill. 

Park at the Ørekroken car park and walk across the road. To get to the screw, follow the marked path. The Archimedes screw is 400 meters from the road.