Several of the most unusual and interesting items in Escape from Pompeii are from the Museum of the Parco Archeologico dei Campi Flegrei housed in the Castle at Baia on the Bay of Naples. The Archaeological park covers the ancient sites of Cumae, Puteoli (modern Pozzuoli) and Baiae which were a lot more famous to ancient Romans than Pompeii and Herculaneum. The sites are on northern side of the Bay as it stretches past Mount Vesuvius and Naples.
All three sites are situated in or around the Campi Flegrei, which translates as the fields of fire. The Campi Flegrei is one very large ground level volcano with gaseous fumeroles, boiling mud pools, and numerous smaller craters – about 24 of them – some of them flooded like Lake Avernus. The caldera of the volcano continues underwater into the Bay of Naples. If it were erupt it would be catastrophic.