Villazgo de Itsasondo y minería de pizarra Historical milestone · Itsasondo, Goierri, Gipuzkoa Image of Itsasondo, not of the place itself. Itsasondo obtained town status in 1615; its economy long relied on slate mining, which ceased operating in 1970. 1615; minería hasta 1970 Photo: Txapisotegi (CC BY-SA 4.0) What to see and do in Itsasondo