A quadrangular tower 13 metres high, resting on two floors below it and standing like a sentinel of the sea on the northeastern coast of Sardinia, overlooking the Strait of Bonifacio. It is the distinctive lighthouse of Punta Sardegna, a tourist resort in the territory of Palau, which is one kilometre away, exactly as far as the captivating Porto Rafael. The construction of the lighthouse dates back to 1913 and was carried out by the Genio Civile (Civil Engineering Department). After decades of abandonment, the Coastal Observatory of the Natural Underwater Environment (OCEANS) has been located there since 1995. One of its distinctive features is that the beacon stands on one of the terraces and not on the tower.