Geo-archaeological core samples revealed a submerged environment, in a narrow inlet which penetrated as far as the base of the scarp on which the Greek town walls were subsequently built. The excavation brought to light beach levels, with materials datable from the Late Bronze Age onwards. A facing slab with a double plait dated to about the middle of the 6th century B.C. and constituted a clue to the presence of a sacred building which predated the foundation of Neapolis.

The coastal strip outside the walls was occupied in the second half of the 5th century B.C. In fact, south of the station shaft a cemetery area was discovered which to date has revealed infant burials, cremation burials and burials inside jars. A building to the north of the necropolis dated to the same period. Three parallel curtain walls in tufa blocks alternating with cross walls in tufa chippings were preserved. At the end of the 4th century B.C. a new building was constructed, on the same alignment as the walls behind and delimited to the north by a beaten tufa road surface. This was a rectangular hall with a banqueting room. Of the latter a floor and the side benches for the klinai, made of opus signinum decorated with limestone tesserae, were preserved. The presence of votive objects may suggest a sanctuary function for the complex which seemed to remain in use until the mid 3rd century B.C. It was definitively abandoned at the beginning of the 2nd century B.C., when the wells providing its water were obliterated by dumps from pottery workshops.

Around the middle of the 2nd century B.C. the beach in front of the walls was monumentalised. To date this is attested only by the structures of a portico of tufa blocks bearing numerous quarry marks situated south of the station shaft.