Ponza

Ponza is a 7. 3 square kilometre volcanic crescent in the Tyrrhenian Sea, 40 km off the Lazio coast at Formia and 90 km off Naples. It is the main island of the Pontine archipelago.

The shape is the story: the island is half of a collapsed Pliocene volcano, a curved ridge of pumice and white tuff cliffs rising 280m above the sea, with sheltered bays carved into the eastern, leeward side and vertical cliffs facing west into open water. The settlement sits at the southeast end, where the only natural harbour is, because that is the sheltered side. Ferdinand IV of Naples brought settlers from the Bay of Naples in the 1770s to displace pirate use of the island, and the port and houses above it date from that colonisation.

The north of the island, Le Forna, is a different register entirely: greener, quieter, given over to rock pools and abandoned mineral workings rather than the working harbour and its piazza at sea level. The Roman fishpond caves, at the southeastern tip, show that this pattern of use goes back further still: aristocrats carving private breeding tanks into the same cliffs that would later be settled and painted at the harbour. The food is Tyrrhenian-island: zuppa di pesce, spaghetti alle vongole, fresh tuna, pesce azzurro, lentils from neighbouring Ventotene, and the local Biancolella and Forastera white wines grown on terraced volcanic slopes.

Ferries from Formia and Anzio run year-round but service drops sharply October to April. The island is seasonal in a literal sense: summer roughly doubles its population with Romans and Neapolitans, while winter empties the restaurants and leaves the place quiet. What the island amounts to, in the end, is a single volcanic ridge worked in layers: Roman engineering at one tip, an 18th-century harbour settlement at the other, and an untouched, quieter half left to the north.