A spectacular drone video of the Temple of Poseidon captures the glory of the ancient monument situated at the southern tip of Attica, in cape Sounio. The temple is one of the major monuments of the Golden Age of Athens. Its remains are perched on the headland, surrounded on three sides by the sea. It was constructed in 444–440 BC. This was during the ascendancy of the Athenian statesman Pericles, who also rebuilt the Parthenon in Athens. It was built on the ruins of a temple dating from the Archaic period. It is perched above the sea at a height of almost 60 metres (200 ft).

The design of the temple is a typical hexastyle, i.e., it had a front portico with six columns. Only some columns of the Sounion temple stand today, but when intact it would have closely resembled the contemporary and well-preserved Temple of Hephaestus beneath the Acropolis, which may have been designed by the same architect. As with all Greek temples, the Poseidon building was rectangular, with a colonnade on all four sides. The total number of original columns was 36: 15 columns still stand today. The columns are of the Doric Order and were made of locally quarried white marble.