The largest submerged archaeological zone in the world sits off the coast at Pozzuoli between Capo di Posillipo and Capo Miseno.
Unlike the volcanic ash and lava which destroyed Pompeii and Herculaneum this Roman territory was sent to the grave by underground activity which literally removed the foundations.
The area simply sunk into the sea thanks to a phenomenon called 'bradyseism'.
Ancient Pozzuoli was a buzzing place and the port of Miseno was home to the largest Roman fleet in the Mediterranean.
Ceasar's wharf and the dock to the Imperial Villa can be seen underwater as can the Villa of Hortensius, a rival to Cicero.
Another submerged relic to look out for is the enticing Imperial Nympheum of Baia, alas no more.
A special boat with a transparent plastic hull allows the visitor to view what remains.
Much of the ancient coastal strip, which contained the harbor town of Puteoli, became submerged over the centuries but it is still possible to see the old port facilities underwater.
Until the Roman port of Ostia overtook it, the town was a famous center for the export of glass, terracotta, perfumes and textiles made by craftsmen schooled in the Hellenistic, Egyptian and Phoenician traditions.
The name 'Phlaegrean' is derived from the Greek for 'burning'. Fire and water, primeval stuff and it was apparently here that Dante witnessed his 'Inferno'.
The picture above is of Lago Fusaro where many of the local mussels are cultivated.
If you want to know the location of the restaurant terrace from where this fine view was recorded, then write to us.