Del balneario al campo de concentración Historical milestone · Iruña Oka/Iruña de Oca, Cuadrilla de Añana, Álava Image of Iruña Oka/Iruña de Oca, not of the place itself. The Bolívar spa was acquired in 1914 by the Brothers of Mary; between 1940 and 1947 it operated as a Francoist concentration camp, and later as a prison until 2011. Photo: Basotxerri (CC BY-SA 4.0) What to see and do in Iruña Oka/Iruña de Oca