The forges of Jyrkkäkoski (Jyrkän Ruukki)
About 20 kilometres from Sonkajärvi, along the Jyrkkäkoski rapids: a blast furnace allowed from 1831 and forges that brought the area to life until 1919. The heritage site, restored by the Finnish Heritage Agency, houses a forge museum, a nature trail and Ruukin Tupa café.