Tír na nÓg

Tír na nÓg is the fabled island off the west coast of Ireland "The land of perpetual youth" where the Tuatha de Danann (the Sidhe) resided.  It also was home to a few mortals who were carried there by the Sidhe such as the Celtic hero Oisín who loved the ban-sidhe (fairy woman) Niamh and lived on the island for what he perceived to be a year.  Time on Tír na nÓg seemed to pass at a different rate to time on earth. Hence when Oisín returned to his homeland to visit his family and friends he discovered that they were all long dead and three hundred years had passed by.