On the promontory of Santa Marinella, where the Odescalchi Castle now stands, the site of an Etruscan settlement has been identified, on which a beautiful and luxurious Roman villa overlooking the sea was built. Only references relating to ancient maps remain of the Etruscan settlement. The Roman structure must have been very large and consisted not only of the residential part but also of a small port and a fish farming facility (fishpond) built in the sea. The prestigious structure was built at the behest of the Roman jurist Ulpian in the 3rd century BC. Currently, small portions of walls remain visible right next to the wall overlooking the sea. These structures must be searched for carefully, but they preserve evidence of the majesty of the structure. The small portions currently visible were part of the supporting terracing of the villa and can be observed by looking carefully along the stretch of the walk that from the small port reaches in front of the outer wall of the tourist port. Most of the villa was explored in excavations carried out in 1838 near the Odescalchi Castle. Thanks to these investigations, it was discovered that there were numerous porticoes directly overlooking the sea, rooms intended for thermal baths, but above all, numerous marble statues, now dispersed among numerous private collections. Important references are also regarding the presence of mosaics of excellent workmanship, also currently dispersed. What remains with certainty is the charm and beauty that this landing point has preserved unchanged over time, from the Etruscan era to today.