Tír na nÓg (Ol Irish Tír na n-Oc ), (IPA: [tʲi:ɾʲ n̪ˠa n̪ˠo:g]), called in English the Land of Eternal Youth or the Land of the Ever-Young, is the most popular of the Otherworlds in Irish mythology, perhaps best known from the myth of Oisín, one of the few mortals who lived there, and Niamh of the Golden Hair. It was where the Tuatha Dé Danann or sídhe settled when they left Ireland's surface, and was visited by some of Ireland's greatest heroes. Tír na nÓg is similar to other mythical Irish lands such as Mag Mell and Ablach.