The Temple of Poseidon at Sounion is known for its stunning location on a rocky promontory overlooking the Aegean Sea. The temple offers visitors panoramic views of the sea and the surrounding countryside, and has been the subject of many works of art and literature, including Lord Byron's poem "Isles of Greece."

Located on the southern tip of the Attica peninsula, about 69 kilometers southeast of Athens, Greece. It is dedicated to Poseidon, the god of the sea, earthquakes, and horses in Greek mythology. The temple was built in the 5th century BCE during the Golden Age of Athens, and was part of a larger sanctuary complex that included altars, a theater, and a wall to enclose the area. The temple was constructed using local white marble and features 34 Doric columns, of which 15 are still standing today.

Today, the temple is a popular tourist destination and is open to visitors year-round. Visitors can explore the ruins of the temple and the surrounding sanctuary complex, and learn about the history and significance of the site through informational displays and guided tours.