Extra virgin olive oil of Bajo Aragón Food and drink · Híjar, Bajo Martín, Teruel Image of Híjar, not of the place itself. The protected designation of origin, recognised in the year 2000, requires a minimum of eighty per cent empeltre olive. The result is a fluid oil, of a colour between golden and old gold, which is produced in the oil mills of the Martín valley. Photo: Willtron (Wikimedia Commons) (CC BY-SA 3.0) What to see and do in Híjar