Oisín and Tír na nÓg in County Kerry
On the shores of Lough Leane in County Kerry Oisín, the son of Fionn MacCumhall, fell in love with the beautiful and immortal Niamh. He went with his paramour to the land of eternal youth, Tír na nÓg. He became homesick after a while, desperate to visit his relatives. Niamh lent him her horse to gallop home. Sadly, upon arrival he found out that 300 years had passed, and his family were long gone. Distraught, he stepped off his horse and aged 300 years, dying soon after.