The Gold Mines of the Sierra Jaeña Curiosity · La Nava de Ricomalillo, La Jara, Toledo Image of La Nava de Ricomalillo, not of the place itself. Seams of gold-bearing quartz were worked in the Sierra Jaeña from Roman times until the end of the 19th century. During the 18th century it was the most productive gold mine in Spain. Photo: Viquipèdia (CC BY-SA 3.0) What to see and do in La Nava de Ricomalillo