Protected by the cliff surmounted by the Castle, dominated by the austere imposingness of the ancient Aragonese fortification that today houses some of the archaeological jewels found in the sea surrounding it, the beach of Castello di Baia extends at the end of the wide Gulf of Pozzuoli.

It was born to protect the archaeological area guarded by the sea and revealed in the inlet of Baia, starting from the end of the Sixties of the last century. A submerged park, established in 2002, which in 2007 was equated to a Marine Protected Area and entrusted for management to the Archaeological Superintendence, which protects with the Campi Flegrei Archaeological Park also what of the ancient bay has been preserved above the