The archaeological area of Lucus Bormani was a stop station along Via Iulia Augusta made by Emperor Augusto in 13/12 BC, to facilitate the connections between the Po Valley and South Gaul.

The remains still visible are very few and ruins found near the hospital and the church of San Nazario. In particular, the wreckage of the "dolia" ship sunk in the waters in front of the Gulf of Diano, whose finds can be seen in the civic museum of Diano Marina.

In the archaeological area of Prato Fiorito there is the Church of the Nazarite Saints and Celso, today a defeated building. It was built over to other buildings of Roman times with an intricate architectural style of masonry of different eras.