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Stemma di Bacoli

Campania · Napoli

Bacoli

A town twenty kilometers west of Napoli, the Roman Bauli, where a cistern fed the imperial fleet at Miseno.

Known for

  • PISCINA MIRABILIS

    Largest Roman cistern in the western Empire, seventy by twenty-five by fifteen meters, built to supply fresh water to the imperial fleet at Misenum.

  • MISENUM

    Base of the Classis Misenensis, the largest Roman fleet in the Mediterranean, now a frazione of Bacoli with a natural harbor and Roman ruins.

  • BRADYSEISM

    Active geothermal phenomenon raising and lowering the Campi Flegrei coastline; underwater Roman ruins at Baia are the visible result.

When to visit

Best · May–Sep

  • J
  • F
  • M
  • A
  • M
  • J
  • J
  • A
  • S
  • O
  • N
  • D
  • Best
  • Hot or crowded
  • Quiet
  • Mostly closed

The festa: Sant'Anna, 26 July

Why come

Bacoli sits at thirty meters on the western lobe of the Campi Flegrei, looking onto Lake Miseno and its headland across the Bay of Pozzuoli. The Romans called it Bauli. In the late Republic and early Empire it was a resort lined with the villas of senators and emperors, and the fleet base nearby, the Classis Misenensis, was the largest in the Mediterranean.

Most of that infrastructure is still here, scattered through the residential blocks that now fill the town, so that a cistern or a cistern complex turns up between apartment buildings rather than in an isolated park. The town's two promontories divide its Roman past between them: the harbor side toward Miseno, where the fleet and its water supply were based, and the Baia side, where the villas and the later Aragonese castle stand. Bacoli is also an active geothermal zone, and bradyseism, the slow rise and fall of the Campi Flegrei coastline, is still measurable here, the same force that put the Roman villas at Baia underwater. What survives above ground and what has sunk below the sea are the same story of ground that will not stay still.

The Sunday letter

We haven’t written Bacoli’s letter yet.

One town every Sunday, with the photo, the food, the festa. Be there when this one comes up. Free, by Peter & Sophia from Pietrasanta.

Bacoli — photo 1
Bacoli — photo 2

What to see

  • Piscina Mirabilis

    Forty-eight cross-shaped pillars hold up the roof in rows, the scale meant to be walked through rather than read about, still standing among the residential blocks that have grown up around it.

  • Cento Camerelle

    Second cistern complex four hundred meters from the Piscina Mirabilis, on two superimposed levels, locally called the Prisons of Nero.

  • Castello Aragonese di Baia

    Late-fifteenth-century Aragonese fortress on the Baia promontory, since 1993 the seat of the Museo Archeologico dei Campi Flegrei.

  • Capo Miseno

    Headland on the western tip of the Bay of Napoli, with the natural harbor below it and a panoramic walk out to the lighthouse.

  • Parco Archeologico Sommerso di Baia

    Submerged Roman villas visited by glass-bottom boat or snorkel tour, sunk beneath the water over centuries rather than built there.

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We recommend

Where to eat

Not our picks, but places the guides put their name to: a Michelin star, a Gambero Rosso fork, a Slow Food snail, a Michelin Key for the hotels. Worth a table, a counter, or a night when you pass through.

  • CaracolRistorante

    One Michelin star for Caracol, along with two Gambero Rosso forks (83/100) and a place in L'Espresso's Top 300.

  • Aguglia osteria di mare 2021Ristorante

    Aguglia osteria di mare 2021 has a Gambero Rosso listing to its name.

  • Hosteria BugiardaRistorante

    Hosteria Bugiarda has one Gambero Rosso fork (78/100) to its name.

  • Il Testardo - Locanda AtipicaRistorante

    A Gambero Rosso listing, at Il Testardo - Locanda Atipica.

  • Riccio RestaurantRistorante

    Riccio Restaurant holds a spot in the Michelin Guide.

Living here

  • Population 25,230
  • Commuter belti
  • Pharmacy in town
  • High school within a 30-minute drive
  • Train station in the comune
  • Nearest airport Naples / Salerno, 35 min drive
  • Regional capital Napoli, 31 min drive

This is a thermal town — terme operate here.

Tags & datadesignations · numbers · sources

The numbers

  • Elevation: 30 m
  • Population: 25,230
  • Surface area: 13.47 km²

These figures were compiled from public directories — ISTAT, OpenStreetMap, Wikidata — and from the official listings of the guides named on this page. Town details change; verify with official sources before you travel.

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