One of the most important sights of Attica is the temple of Poseidon in Sounio. Sounio is about an hour away from the center of Athens, following a fantastic route by the sea. The temple of Poseidon attracts thousands of tourists every year as it is one of the most important monuments of cultural heritage. our guide will be waiting for you until you finish your tour and will take you back to the place you want. notes: estimated tour duration 4 hours. every extra hour is charged with 20 euros.