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Underground Naples - Explore the Hidden City

Beneath the vibrant streets of Naples lies a hidden world shaped over 2,500 years. Ancient tunnels, vast cisterns, catacombs, and secret passageways reveal a city beneath the city.

Underground Naples is an independent visitor guide helping you discover, compare, and plan visits to Naples’ underground sites — from historic tunnels to catacombs and underground museums.

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Underground Tours & Tickets in Naples

Naples offers several guided underground experiences, each exploring a different layer of the city’s hidden history. From ancient tunnels beneath the historic center to modern-era passageways and wartime shelters, underground visits are among the most fascinating things to do in Naples.

Most underground sites can only be visited with a guide and operate with limited group sizes. For this reason, booking tickets in advance is generally recommended, especially during busy periods.

Napoli Sotterranea

With this ticket, you’ll explore the ancient cisterns and tunnels under the Sanità district, discovering one of Naples’ most atmospheric underground complexes.

Spanish Quarter

Guided underground experience beneath one of Naples’ most vibrant neighborhoods, revealing hidden tunnels and chambers below the historic streets.

Galleria Borbonica

Guided visit through the monumental Bourbon tunnel, originally built as a royal escape route and later used as an air-raid shelter during World War II.

Historic Underground
Heritage of Naples

Underground Naples

All the main underground sites at a glance

Naples’ underground sites are spread across the historic center and nearby districts, each offering a unique perspective on the city’s hidden past. From ancient aqueducts and cisterns to burial sites and underground museums, these attractions reveal how Naples evolved beneath the surface over centuries.

Napoli Sotterranea Underground

A vast network of ancient cisterns carved into the tuff stone, once part of Naples’ water supply system and today one of the city’s most atmospheric underground experiences.

Spanish Quarter Underground

Hidden beneath one of Naples’ most lively districts, this underground site reveals tunnels and chambers that contrast sharply with the bustling streets above.

Galleria Borbonica

A monumental 19th-century tunnel built as a royal escape route, later transformed into an air-raid shelter during World War II, filled with historical artifacts and large underground passages.

Catacombs of San Gennaro

The largest and most important catacombs in Southern Italy, featuring early Christian frescoes, bishops’ tombs, and vast underground basilicas carved into the rock.

Catacombs of San Gaudioso

An evocative underground burial site beneath the Basilica of Santa Maria della Sanità, known for its unique frescoes and skull niches dating back to the early Christian era.

Lapis Museum

An immersive underground museum beneath the historic center of Naples, combining ancient Greek cisterns, Roman remains, and modern multimedia installations.

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An extraordinary underground landscape

A hidden city beneath Naples

One of the most famous ways to explore Naples below ground is through Napoli Sotterranea, a guided route that follows ancient tunnels beneath the historic center. This underground system developed over centuries, beginning with Greek and Roman excavations and later adapted for water collection, storage, and protection.

Beneath the streets of Naples, these passages reveal cisterns, chambers, and carved spaces shaped by the city’s changing needs. From early aqueducts to shelters used during World War II, this route offers insight into how underground spaces supported life above ground — representing one distinct chapter within Naples’ broader underground history.

80 km

Of underground tunnels beneath Naples

2500 years

Of continuous underground history

40 m

Maximum depth below street level

1+ million

Visitors per year across Naples’ underground sites

How to Plan an Underground Visit in Naples

Planning an underground visit in Naples depends on which type of site you want to explore. Underground tunnels, catacombs, and underground museums are managed independently, have different access points, and follow different visiting rules.

Instead of offering a single set of opening hours or tickets, this guide helps you understand the options and choose the experience that best fits your interests.

  • Underground tunnels are typically visited as guided routes beneath the historic center or specific neighborhoods
  • Catacombs are ancient burial sites that can only be visited with an authorized guide
  • Underground museums are archaeological spaces located beneath churches and historic buildings, often visited as part of a larger complex

Each section of this site explains how visits work, what to expect, and how access is organized for that specific type of underground site.

The online English guide to Naples’ underground attractions, with all the practical information you need to plan your visit beneath the city.

This website is an independent visitor guide and is not affiliated with or endorsed by the official operators or administrations of the underground sites featured.

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© undergroundnaples.com | Underground Naples is an independent visitor guide and is not an official website of any underground site in Naples.