The Temple of Poseidon is an ancient Greek temple, which is now in ruins. It is said to have existed on Cape Sounion, south of Athens, Greece. It was constructed between, 444 and 440 BC.
Why it is special: Sitting high above the sea, at 60 metres, the Temple was designed in a traditional hexastyle, with a front portico comprising six columns, rectangular in shape and colonnade on all four sides. However, out of the six only a few columns remain today. Excavations helped uncover various artifacts, statues, reliefs and inscriptions that have now been preserved in the Athens National Archaeological Museum.