The Angevin-Aragonese castle in Agropoli has a triangular shape with three circular towers and stands on the highest point of the headland. Around the walls there is a wide and deep moat which today is visible just on the side of the village and disappears while on the eastern side because of agricultural works and past landslide.
The castle was built on the 6th century Byzantine foundations by the Aragonese reign in the 15th century. The Inside part of the castle is composed of a central square, nowdays used as on open air theater, and on the northern side by the “French Room”.
La Hougue Bie is a Neolithic ritual site which was in use around 3500 BC. Hougue is a Jèrriais/Norman language word meaning a \'mound\' and comes from the Old Norse word haugr. The site consists of 18.6m long passage chamber covered by a 12.2m high mound. The site was first excavated in 1925 by the Société Jersiaise. Fragments of twenty vase supports were found along with the scattered remains of at least eight individuals. Gravegoods, mostly pottery, were also present. At some time in the past, the site had evidently been entered and ransacked.
In Western Europe, it is one of the largest and best preserved passage graves and the most impressive and best preserved monument of Armorican Passage Grave group. Although they are termed \'passage graves\', they were ceremonial sites, whose function was more similar to churches or cathedrals, where burials were incidental.