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Naples Underground

Naples is a city of extraordinary beauty and art, but few people know about its hidden history. Forty meters underneath the ancient city of Naples lies a vast geothermal zone made of tuff (a volcanic sandstone). Extensive underwater caves that were used as cisterns led to further development of tunnels and underground structures. In fact, these caves and caverns are the soul of Naples, and what has made the city what it is today.

Book a Naples underground tour &

Discover the fascinating remains of the ancient city beneath its streets!

Located in the heart of Naples, just next to Piazza del Plebiscito, the underground city Napoli holds the most important heritage of the city. The aqueduct network built by the Romans provided drinkable water to the whole city. By venturing underground Naples, you’ll also find emperor Nero’s theater, where he performed his shows in Naples. Over the centuries, more caverns and passageways have been created up to a point during World War II, where the underground network was used as an air-raid shelter. Travel through more than 2400 years of history while exploring aqueducts, sewer tunnels, rainwater cisterns, caverns, and catacombs. Learn the true history of Naples alongside an expert local guide!

Naples Underground: Highlights

#Napoli Sotterranea

More Underground Sites In Naples

Napoli Underground: Visitor Tips

Quick Facts



Known For

Nature & History

Activity Type

Subterranean Naples

Yearly Visitors

6 Million + (City)

High Season

December - March

Currency Required

European Euro

Time Zone

GMT +2:00

Naples Underground: Highlights

  • Explore the Greek-Roman Aqueduct that has supplied water to Naples for more than 23 centuries.
  • Take an insight look into the underground chamber used as air raid shelters during World War II. Nowadays, you can still find war relics such as weapons and vehicles left abandoned in the tunnels.
  • Walk through the remains of the Roman Theater and visit emperor Nero’s private dressing room.
  • Marvel at the newly discovered drain sewers from the Bourbon period, Summa Cavea.  
  • Visit Napoli’s Hypogeum Gardens, where plants grow deep under the ground, far from pollution and harmful microorganisms. Students and university researchers use this investigational botany for scientific research.

#Napoli Sotterranea

Exploring underneath Naples takes you through 2400 years of history; meaning you’ll get to capture ancient infrastructure and authentic archaeological pieces.

  • Snap some shots while walking through the ancient labyrinth and caves.
  • Capture the ruins of the 1st-century theater of Neapolis.
  • Photograph the objects and documents from World War II exhibited in the Museo della Guerra.

Choose your best snap from the archaeological site in Centro Storico. Post it on your IG, and tag #dotravelgram for a chance to be featured!

More Underground Sites In Naples

Although Naples’ castles and museums are impressive, there’s so much more to see if you go underneath its streets. Underground, you can find the real essence of Naples.

  • The Bourbon Tunnel: A 14th-century secret royal passage for King Ferdinand II of Bourbon.
  • Santa Maria delle Anime del Purgatorio ad Arco: A beautiful church from the XV century where you descend, through a narrow staircase, into an ancient crypt.
  • Fontanelle Cemetery: An ossuary, located within a cave in the tuff hillside of the Materdei district.
  • The Neapolis Sotterrata: the monumental complex of San Lorenzo Maggiore houses the archeological remains of the Macellum (indoor market) and the Dioscuri temple (open-air theatre)
  • Catacombs Of San Gennaro & San Gaudioso: These are underground paleo-Christian burial sites. The most ancient part of the Catacombs of San Gennaro dates back to the II century AD.

Napoli Underground: Visitor Tips

  • The underground world in Naples is only open to visitors as part of a guided tour. Therefore, it’s highly recommended to book your Naples subterranean tour in advance, especially during high season if you want to guarantee a visit.
  • The main underground Naples entrance is located in the left corner of Piazza San Gaetano. The other access point is next to the Bar Gambrinus at the Piazza Plebiscito, roughly 2 km away.
  • If you suffer from claustrophobia, this experience might not be suitable for you. With the underground tour of Naples, you’ll be descending 40 meters below the street level and travel through some narrow passages.
  • Are you venturing to the underground city Naples has hidden away? Note the temperature is quite low, so it’s advisable to bring a light jacket to use during your visit.


What are the underground Naples opening hours?

The Naples Italy underground city is open every day from 10 am to 6 pm, and the guided tours start every hour. Additionally, during August, the closing time extends to 8 pm. 

Where can I buy tickets for the underground city in Naples?

While you can buy your tickets for Napoli underground at the entrance, visiting the underground site is only possible with a guided tour. For this reason, booking online is advisable for those wanting to secure their spot on a Naples tunnels tour

How much does an underground tour Naples costs?

The Naples underground ticket price for the tours starts at 10€. It's best to book your tickets for this unique experience in advance to secure your spot on the tour and find the best deals. 

How long is a tour of the underground city of Naples?

The tour lasts about 2 hours, during which an expert guide takes you through the underground geothermal zone and introduces you to the history of Naples.

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Italy / Campania / Naples / Naples Underground
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