The largest of these, the Bardenas Reales has a surface of 418 km2 and is governed by a board of representatives of 20 bordering municipalities, a valley in the Pyrenees, and a monastery, all of which have rights to use the area.
Suurimal nendest, Bardenas Reales, on pindala 418 km² ja seda valitseb 20 külgneva omavalitsuse, Püreneede oru ja kloostri esindajatekogu, kellest kõik omavad õigust ala kasutada.