Cape Sounion is noted as the site of ruins of an ancient Greek temple of Poseidon, the god of the sea in classical mythology.

(From 15:00 to 19:00 approximately):

Drive along the coastal road, passing the wonderful beaches of Glyfada, Vouliagmeni & Varkiza to the most Southern point of Attica, Cape Sounion, where the white marble pillars of the Temple of Poseidon stand. On the way, you have a splendid view of the Saronic Gulf and the little islands offshore.
After visiting the Temple of Poseidon, you have time to walk at leisure on the rocky promontory of Sounion.
Pick up and drop off included.