Nearby Cloughmore is a 50-ton granite boulder perched on the slopes of Slieve Martin, 1,000 ft above the village of Rostrevor, and known locally as 'the big stone'. It was deposited there by retreating glaciers during the Last Glacial Maximum. However, local legend says that the stone was thrown by a giant from the Cooley Mountains, on the other side of Carlingford Lough. Walking around the stone seven times will allegedly bring good luck.