Tír na nÓg is a mythical land in Irish folklore, often described as a paradise where time stands still and the inhabitants live in eternal youth and happiness. It is frequently associated with the Tuatha Dé Danann, a race of supernatural beings in Irish mythology. In stories, Tír na nÓg is typically reached by crossing the sea or through magical portals. The most famous tale involves Oisín, a warrior who travels to this enchanting realm with Niamh, a beautiful fairy princess. After spending many years there, he returns to find that centuries have passed in the mortal world.