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.
Roman Walls of Lugo are an exceptional architectural, archaeological and constructive legacy of Roman engineering, dating from the 3rd and 4th centuries AD. The Walls are built of internal and external stone facings of slate with some granite, with a core filling of a conglomerate of slate slabs and worked stone pieces from Roman buildings, interlocked with lime mortar.
Their total length of 2117 m in the shape of an oblong rectangle occupies an area of 1.68 ha. Their height varies between 8 and 10 m, with a width of 4.2 m, reaching 7 m in some specific points. The walls still contain 85 external towers, 10 gates (five of which are original and five that were opened in modern times), four staircases and two ramps providing access to the walkway along the top of the walls, one of which is internal and the other external. Each tower contained access stairs leading from the intervallum to the wall walk of town wall, of which a total of 21 have been discovered to date.
The defences of Lugo are the most complete and best preserved example of Roman military architecture in the Western Roman Empire.
Despite the renovation work carried out, the walls conserve their original layout and the construction features associated with their defensive purpose, with walls, battlements, towers, fortifications, both modern and original gates and stairways, and a moat.
Since they were built, the walls have defined the layout and growth of the city, which was declared a Historical-Artistic Ensemble in 1973, forming a part of it and becoming an emblematic structure that can be freely accessed to walk along. The local inhabitants and visitors alike have used them as an area for enjoyment and as a part of urban life for centuries.
The fortifications were added to UNESCO"s World Heritage List in late 2000 and are a popular tourist attraction.