Museums Antiquarium Comunale The Municipal Antiquarium was established in 1975 at the behest of the Municipality of Neptune with the intent to collect the archaeological material found in the territory. The most substantial part of the finds consists of ceramics and precious lamellas as well as findings of fossil malacology of the tertiary and the quaternary.
Castles, palaces and mansions Forte Sangallo Fort Sangallo, located by the sea, was built in 1501 by Pope Alexander VI and his son Cesare Borgia. One of the purposes of this construction was to strengthen the fortifications already present in the place. It has a square base, with at the top of the ramparts, very thick walls with a large keep in the center. Nowadays it is in excellent condition and open to tourists.