The ironworks in Kimo was founded by Petter Heijke in 1703. Petter Heijke chose the place because there was an enough deep harbour in Oravainen, waterpower and wood for making charcoal. The ore was brought from Utö in the southern Baltic sea and from Herräng mines in Roslagen. In Kimo it was forged into iron-pigs. The iron-pigs were then tranported further up the river to the forges in Kimo where it was refined into iron-bars.
Kimo was acquired by captain Lars Magnus Björkman in 1818. He renewed ironworks strongly and built for example a lighthouse to the Stubben island. Iron manufacturing ended in 1890s and the factory site started textile business. The heyday of textile manufacturing in Oravainen was in 1920s-1930s.
The original ironworks site and buildings are well-preserved. Today the Kimo Ironworks includes three hammersmith´s workshops: the Lower Mill, the Middle Mill and the Upper Mill. The Lower Mill is the centre of the museum exhibiting the the iron manufacturing. The museum and art gallery are open on order or when there are events arranged on the site. There are also a café and restaurant. Several events are arranged in the ironworks area during the summer season.
The Goseck circle is a Neolithic circle structure. It may be the oldest and best known of the Circular Enclosures associated with the Central European Neolithic. It also may be one of the oldest Solar observatories in the world. It consists of a set of concentric ditches 75 metres across and two palisade rings containing gates in places aligned with sunrise and sunset on the solstice days.
Its construction is dated to c. 4900 BC, and it seems to have remained in use until 4600 BC. This corresponds to the transitional phase between the Neolithic Linear Pottery and Stroke-ornamented ware cultures. It is one of a larger group of so-called Circular Enclosures in the Elbe and Danube region, most of which show similar alignments.
Excavators also found the remains of what may have been ritual fires, animal and human bones, and a headless skeleton near the southeastern gate, that could be interpreted as traces of human sacrifice or specific burial ritual. There is no sign of fire or of other destruction, so why the site was abandoned is unknown. Later villagers built a defensive moat following the ditches of the old enclosure.
The Goseck ring is one of the best preserved and extensively investigated of the many similar structures built at around the same time. Traces of the original configuration reveal that the Goseck ring consisted of four concentric circles, a mound, a ditch, and two wooden palisades. The palisades had three sets of gates facing southeast, southwest, and north. At the winter solstice, observers at the center would have seen the sun rise and set through the southeast and southwest gates.
Archaeologists generally agree that Goseck circle was used for observation of the course of the Sun in the course of the solar year. Together with calendar calculations, it allowed coordinating an easily judged lunar calendar with the more demanding measurements of a solar calendar.