Best caves around Ercolano offer a unique exploration of both natural geological formations and significant historical underground environments. The region is famed for the ancient Roman city of Herculaneum, buried by the eruption of Vesuvius in 79 AD, which features extensive man-made tunnels and archaeological sites. These locations provide insights into Roman engineering and the area's volcanic history. Visitors can discover a range of subterranean experiences, from natural fissures to extensive ancient tunnel networks.
Last updated: May 2, 2026
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In the off-season (end of October) I was even able to get a guided tour at 2pm without booking in advance.
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Many ancient passages, sometimes narrow, sometimes wide
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Napoli sotterranea is a parallel city born together with the current city and extends under the entire historic center at a depth of over 40 meters. The Official and Authorized route of Napoli Sotterranea starts from Piazza San Gaetano 68, on Via dei Tribunali next to the Basilica di San Paolo Maggiore.
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Stairs lead from the Chiesa di San Lorenzo Maggiore seven meters below today's street level. In just a few minutes you can travel back in time almost 2,000 years to the middle of a completely preserved Roman commercial and residential street.
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Entrance to the oldest and only officially recognized tour of the 'Underground City'. Massimiliano, one of the guides, spent 1h30 with us sharing exciting facts about the Greek Neapolis, which lives on in today's cityscape. Highlights of the tour were underground-growing plants 🪴, the brief experience as a Pozzaro🕳️👀🦸 (people who had access to the underground wells below the city and are depicted today in the murals of the Quartieri Spagnoli), and above all the discovery of the Greek-Roman theatre 🏛️🎭 as part of today's residential units😲, which are accessed through a gap under a bed (!!!). The tour concludes with a small exhibition on the presepi Napolitani and their significance outside the Christian tradition. To avoid the queue (which can sometimes take up to 3 hours), it is recommended to purchase tickets 🎟️🎟️ on the website in advance.
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Entrance to the oldest and only officially recognized tour of the 'Underground City'. Massimiliano, one of the guides, spent 1h30 with us with exciting facts about the Greek Neapolis, which lives on in today's cityscape. Highlights of the tour were underground growing plants 🪴, the short experience as a Pozzaro🕳️👀🦸 (people who had access to the underground wells below the city and who are immortalized today in the murals of the Quartieri Spagnoli) and above all the discovery of the Greek-Roman theatre 🏛️🎭 as part of today's residential units😲, which can be reached through a gap under a bed (!!!). The tour ends with a small exhibition on the Neapolitan nativity scenes (presepi Napolitani) and their significance outside of the Christian tradition. To avoid the queue (which can sometimes last up to 3 hours), it is recommended to purchase tickets 🎟️🎟️ in advance on the website.
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From the table shown in the photo, due to the steep slopes and finally some steps, by bike for the last stretch of about 700/800 meters. we proceed to push, but nothing impossible.
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Around Ercolano, you'll discover a mix of natural geological formations and significant historical underground environments. These include natural fissures, extensive ancient tunnel networks, and archaeological sites that offer a unique glimpse into Roman engineering and the area's volcanic history. While traditional natural caves are less common, the region excels in fascinating man-made subterranean passages.
Yes, you can explore natural formations like Grotta Fissure, a natural monument that allows entry into a lava gap for about 10 meters, offering a great view of the "Hell's valley." Another natural cave is the Madonna di Castello Cave at Gavète, which houses a beautiful lava stone depicting the Madonna di Castello and is a site for an annual pilgrimage.
Yes, the Ancient Theater of Herculaneum offers a unique underground exploration. You can descend more than 20 meters below modern ground level via Bourbon-era tunnels to witness parts of the ancient structure, including the orchestra floor. This experience provides a powerful sense of stepping back in time, with preserved frescoes, historical graffiti, and even small stalactites.
Beyond Herculaneum, you can visit Naples Underground, a historical site featuring tunnels and rooms created centuries before Christ, explored via a guided tour. Another significant site is the San Lorenzo Maggiore Underground Roman Ruins, where you can travel back nearly 2,000 years to a completely preserved Roman commercial and residential street, seven meters below today's street level.
Yes, the Grotta di Seiano (Seiano's Cave), located near Naples, is an impressive artificial tunnel. This nearly 1-kilometer-long gallery was carved through tufa rock in the 1st century BC, showcasing advanced Roman engineering. It connects to the Archaeological Park of Pausilypon, offering a captivating journey with monumental entrances and views of the Bay of Naples.
The Port of Naples features a subsoil crossed by a large network of tunnels, galleries, and aqueducts used throughout history, which is categorized as family-friendly. While specific age recommendations vary, many guided tours of historical underground sites are suitable for families interested in history and unique exploration.
The underground sites offer unparalleled historical immersion. Exploring the Ancient Theater of Herculaneum or the Naples Underground provides a unique perspective on ancient life and Roman engineering. The cool, dim, and often echoing environments create a memorable and evocative atmosphere, distinct from above-ground archaeological explorations.
The area around Ercolano offers various outdoor activities. You can find numerous hiking trails, including routes around Mount Vesuvius like the loop tour of 'The great cone of Vesuvio'. There are also MTB trails and cycling routes that allow you to explore the diverse landscapes surrounding the underground attractions.
Accessibility varies by site. For instance, the Ancient Theater of Herculaneum involves descending via a series of tunnels and staircases, which might present challenges for some visitors. Historical sites like San Lorenzo Maggiore Underground Roman Ruins also involve stairs and sometimes narrow passages. It's advisable to check specific accessibility details for each location before your visit.
Visitors frequently highlight the unique historical immersion and the sense of stepping back in time. The opportunity to explore spaces hidden for centuries, witness ancient Roman engineering, and experience the distinct atmosphere of these cool, underground environments is often cited as a memorable and beautiful experience.
Given that many underground sites maintain a constant cool temperature, even in warmer months, it's advisable to wear comfortable shoes suitable for walking on uneven surfaces and bring a light jacket or sweater. Some passages can be narrow, so comfortable clothing is recommended.


Extend your search for the best caves by checking out these guides of the top ones around Ercolano: