During these last years they were effected, by the Archaeological Superintendence  of  Naples and Caserta, some underwater inquiries along the coastal tract which stretches from Baia to Miseno, and their aim was the tutelage of the archaeological patrimony; after this reconnaissance they were found, in the bay of Marina Grande in Bacoli, a series of structures attributable to a villa of  Roman age (fig. 1).

Fig.1 - Bacoli: general planimetry of the discovered structures

Bacoli is now identified with the ancient site, several times cited by ancient sources, “ad Baulos”. The etymology  of this toponym was related with the stalls where, according to the legend, Hercules let the bulls which he stole from Geryon have a rest.  
Continuing this tradition and because the bradyseism, which caused the submersion of many structures located along the coast, it survived the erroneous news of the presence in this zone of a Temple of Hercules. Paoli, at the end of 1700, mentioned it, in the realization of a topographic plant, among the monuments present in the Phlegraean Fields; and Carletti, twenty years later, confirmed the presence of half-submerged ruins specifying that he saw pillars of Doric style and also a statue of Hercules. Only at the beginning of the XIX century, De Iorio started to advance doubts about their interpretation.

Still today the bay presents, on the dry land, important archaeological ruins: besides the many buildings, now surrounded by modern constructions, there is still the theatre-Nymphaeum known as Grave of Agrippina in the North and the ruins of the so-called Cento Camerelle cistern, situated on the promontory which closes the bay in the South.