Blomsholm

Blomsholm in Skee parish in Bohuslän is an area north of Strömstad where there are many ancient monuments from the Stone Age to the Middle Ages. Among other things, there is one of Sweden's largest referee rings and shipwrecks in the area. Unlike most other referee rings, the referee ring consists of an even number of boulders around the centre stone. The diameter is 38 meters. The shipwreck is 41 meters long, 9 meters wide and consists of 49 stones. These have different heights, the stones amidships are one meter while the stones in the bow and stern are 4 meters high. Also 7 burial grounds from the Iron Age and the large mound Grönehög can be found here.

Source: Wikipedia