Slieve League, also known as Sliabh Liag in Irish, is a mountain located on the Atlantic coast of County Donegal, Ireland. It has the second-highest sea cliffs in Ireland after Croaghaun and some of the highest sea cliffs in Europe, standing at 601 meters (1,972 feet). The cliffs are nearly three times the height of the Cliffs of Moher and almost twice the height of the Eiffel Tower.