Sounion - The Temple of Poseidon
postmarked in 2009 with a Hellas (Greece) stamp
Cape Sounion is a promontory located 69 km (43 mi, by road) SSE of Athens, at the southernmost tip of the Attica peninsula in Greece.
Cape Sounion is noted as the site of ruins of the ancient Greek temple of Poseidon, the god of the sea in classical mythology. The remains are perched on the headland, surrounded on three sides by the sea.