Cape St. Vincent

Cape St. Vincent is a headland in the municipality of Vila do Bispo, in the Algarve, southern Portugal. It is the southwesternmost point of Portugal and of mainland Europe.

Cape St. Vincent was already sacred ground in Neolithic times, as standing menhirs in the neighborhood attest. The ancient Greeks called it Ophiussa , inhabited by the Oestriminis and dedicated here a temple to Heracles. The Romans called it Promontorium Sacrum . Strabo, in his Geography call this cape the most western tip of the known world and reports the place was considered magical. Common people believed the sun sank here hissing into the ocean, marking the edge of their world, which Strabo qualifies as "common and vulgar reports" and attributes to Posidonius

Wikipedia