The entire province of Teruel in northeastern Spain is included in the DO Teruel production category. The air-curing must, however, take place at more than 800 meters above sea level. The hams here are all "white hogs" - Landrace, Duroc or Large White (and crosses). There are no cork-oak ranges in the Teruel area, so these are fed and fattened with commercial feeds. The cool dry climate however makes things just right for producing high quality "serrano" hams.