Together with the various species of birds stopping there during the long migrations, the coots populated permanently, always numerous, the vast coastal wetland. According to Emperor Nero's plans, the long navigable canal connecting Rome to Pozzuoli had to start there.

The Flavio Amphitheatre, which has the same name as the eternal city, it is the third largest after the Coliseum in Rome and the one of Maria Capua Vetere, in Capua.

The most singular monument of Pozzuoli is the macellum, or the public market, better known as the Temple of Serapis for the discovery of the statue of the Greek-Egyptian god seated on a throne with the calathos on his head, a basket, symbol of abundance and fertility.