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Stemma di Bacoli

Campania · Napoli

Bacoli

A Campi Flegrei town twenty kilometers west of Napoli, the Roman Bauli, where the Piscina Mirabilis 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, twenty kilometers from Napoli, looking onto Lake Miseno and the headland of Capo Miseno 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 at Misenum, the Classis Misenensis, was the largest in the Mediterranean. Most of that infrastructure is still here, scattered through residential blocks.

The Piscina Mirabilis, the largest Roman cistern ever discovered in the west, holds seventy meters by twenty-five, fifteen meters deep, on forty-eight cross-shaped pillars; it supplied fresh water to the fleet. The Cento Camerelle, a second cistern complex four hundred meters away, is locally called Nero's Prisons. The Aragonese castle at Baia, on the next promontory, holds the Archaeological Museum of the Campi Flegrei. Bacoli is also an active geothermal zone with bradyseism still raising and lowering the coastline.

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.

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Bacoli — photo 1
Bacoli — photo 2

What to see

  • Piscina Mirabilis

    Largest Roman cistern ever discovered in the western Empire, seventy meters long and fifteen high on forty-eight cross-shaped pillars, supplying water to the fleet at Misenum.

  • Cento Camerelle

    Second Roman 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 and former Roman fleet base on the western tip of the Bay of Napoli, with the natural harbor of Misenum and a panoramic walk to the lighthouse.

  • Parco Archeologico Sommerso di Baia

    Underwater archaeological park of submerged Roman villas, accessible by glass-bottom boat or snorkel tour, the result of bradyseismic subsidence over centuries.

The slow-trip planner

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We recommend

Where to eat and stay

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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