Las diecinueve ferrerías de Orozko Historical milestone · Orozko, Arratia-Nerbioi, Bizkaia Image of Orozko, not of the place itself. Between the 14th and 20th centuries as many as nineteen ironworks operated in the term of Orozko, which transformed the valley's landscape before the rise of pine plantations. Photo: Luistxo (CC BY-SA 3.0) What to see and do in Orozko