The Pyrenees (/ˈpɪrᵻniːz/; Spanish: Pirineos [piɾiˈneos], French: Pyrénées [piʁene], Aragonese: Pirineus, Catalan: Pirineus [piɾiˈnɛus], Occitan: Pirenèus, Basque: Pirinioak [piˈɾinioˌak] or Auñamendiak [auˈɲamendiˌak]) is a range of mountains in southwest Europe that forms a natural border between France and Spain.