It consists of a whole series of vestiges and constructions that allow you to follow the history of Penedes from the Bronze Age to the High Middle Ages. The spectacular Sant Miquel church and the Pla dels Albats necropolis (both from the Middle Ages) stand out.
Within the protected natural environment of the Regional Park of Olèrdola, and with a privileged view over the surroundings of Vilafranca and Garraf, there is a whole series of vestiges and constructions that allow you to follow the history of Penedes since the Bronze Age (about 4,000 years ago) until the High Middle Ages.
It is located in an installation of the Museum of Archeology of Catalonia (MAC), which includes an interpretation center, and the visit to the complex is organized in an itinerary that starts at the interpretation center and links the various points of interest
The vestiges of the Roman era are some of the most interesting, such as the wall (2nd-1st centuries BC), which defended the only point on the mountain that is not surrounded by cliffs and consists of a single central gate and four towers, and the cistern (also from the 2nd-1st centuries BC), dug into the rock and used to store rainwater, unique in the country for its capacity of 350,000 litres.
From the Middle Ages, the spectacular church of Sant Miquel stands out, perched on top of the hill of the same name and destroyed and rebuilt several times since the beginning of the 10th century. It consists of two parts, one pre-Romanesque (built in 929) , which still preserves the apse and stands out for its horseshoe arch, and another from later (10th-12th centuries), which was in use until 1885. It is also necessary to mention the necropolis of Pla dels Albats (10th- XI), with a hundred anthropomorphic tombs excavated in the rock next to the ruins of the chapel of Santa Maria, the various structures of Iberian and medieval streets, houses and silos, the castle, also medieval, and the Roman watchtower.