The Kaaraneskoski's Blast Furnace is the northernmost blast furnace in the 18th and 19th centuries related to the early processing of rock ore. The Furnace is also apart of the larger blast furnace chain associated with the Könkänen's ironworks during the Swedish rule. Kaaraneskoski was the only one that was build.
The ruins of the Kaaraneskoski blast furnace from 1805 testify to a pioneering, early effort to process natural raw materials industrially in northern Finland. The gray-stone lower part of the blast furnace has remained an intact structure in the dam basin of the power plant, the water level of which varies and rises heavily.
The resulting artificial island is exceptional and unique as an industrial historical relic and an element of the water landscape.