The temple of Poseidon, the ancient Greek god of the sea, dominates the southernmost tip of Attica, where the horizon meets the Aegean Sea. Perched on the craggy rocks of Cape Sounio, the temple is enveloped in myth and historic facts dated from antiquity until the present times. Temple of Poseidon was constructed during the 5th century B.C.. This point overlooks the Aegean offering one of the most breathtaking panoramic views in Greece.

There are stories about the ship of King Menelaus who stopped briefly at Sounio on his way back from Troy; or about the unfortunate King Aegeus who drowned himself on that spot and the Aegean Sea got named after him; or about the people who built a temple using local marble to honour the god of the sea and safeguard the profits from the neighbouring Lavrio mines.