灯塔岛是爱尔兰的岛屿，位于大西洋海域，由科克郡负责管辖，最高点海拔高度30米，该岛的灯塔在1897年兴建、1904年开始启用，岛上无人居住。

Fastnet Rock, or simply Fastnet (possibly fromOld Norse Hvasstann-ey, meaning "sharp-tooth isle"; called Carraig Aonair, meaning "lonely rock", in Irish) is a small islet in the Atlantic Ocean and the most southerly point of Ireland. It lies 6.5 kilometres (4.0 mi) southwest of Cape Clear Island and 13 kilometres (8.1 mi) from County Cork on the Irish mainland. Due to its location, Fastnet is known as "Ireland's Teardrop", because it was the last part of Ireland that 19th century Irish emigrants saw as they sailed to North America.