The Castle of Platamonas is a fortification that dates from the period when the area was under the rule of the Franconian knights. It was erected between 1204 and 1222 and it is located in a strategic place that controls the narrow passage (Tempe) between the northern and the southern part of Greece. Its distance from the contemporary village of Platamonas is just 4 kilometers and being on the top of a hill, it is visible from a great range.
The extended excavations on the top of the hill and inside the walls of the castle revealed a series of important discoveries that prove the fact that this spot was the position of the ancient Greek city of Herakleion. The core of the ancient city remains not found, but according to the researchers, it is located on the northwest side of the castle's hill due to shells and coins that were found on recent excavations.
During the centuries, the area of Platamonas and consequently the castle had many different rulers who were the Crusaders, the Byzantines, the Turks, and finally the Greeks. Today, the castle serves as one of the Olympus Festivals' major scenes. It is famous for its great views and the good acoustics while it hosts theatrical performances, concerts and other events.