Seventeen decorated caves of the Paleolithic age were inscribed as an extension to the Altamira Cave, inscribed in 1985. The property will now appear on the List as Cave of Altamira and Paleolithic Cave Art of Northern Spain. The property represents the apogee of Paleolithic cave art that developed across Europe, from the Urals to the Iberian Peninusula, from 35,000 to 11,000 B.C.E.