The salt monopoly Historical milestone · Arcos de las Salinas, Gúdar-Javalambre, Teruel Image of Arcos de las Salinas, not of the place itself. In 1749 salt passed to a monopoly regime and the working of it ceased to be in the hands of the commons to come under state control. In 1907 the Campillo family acquired the salt pans, which have remained in private ownership ever since. 1749 Photo: 19Tarrestnom65 (CC BY-SA 4.0) What to see and do in Arcos de las Salinas