If you’re looking to add a unique twist to your Rome visit, the Piazza Navona & Trevi District Underground Pass might be just the thing. This isn’t your typical sightseeing tour—it takes you beneath the bustling streets to uncover the ancient foundations and secret passages that most visitors never see. Whether you’re a history buff or simply curious about what lies beneath the city’s famous landmarks, this experience offers a different perspective on Rome’s long-standing story.
What makes this tour particularly appealing are two clear highlights: first, the chance to explore underground ruins and structures that date back centuries, and second, the flexibility to go at your own pace thanks to its self-guided audio format. However, a potential drawback is that some travelers might find the check-in process a bit frustrating or experience difficulty locating the exact spots, which could impact the overall flow.
This tour really suits those who enjoy history with a hands-on feel, travelers eager to escape the crowds, or anyone wanting a cool, shaded break from the Roman sun. It’s also a good pick if you’re comfortable exploring independently and appreciate detailed audio guides. Overall, it offers a different way to connect with Rome’s past, without the hassle of large groups or guided bus routes.
Key Points

- Underground Exploration: You’ll visit two underground sites beneath key landmarks, revealing hidden layers of Roman history.
- Self-Guided Flexibility: The audio guides allow you to explore at your own pace, which is perfect for those who prefer independence.
- Historical Significance: The tour includes notable spots like the only remaining part of a Masonry Stadium and ancient aqueduct systems.
- Value for Money: At around $35, the price covers two well-curated underground visits, with accessible audio guides in six languages.
- Potential Challenges: Finding the exact locations and the check-in process may require patience, as some reviewers noted queues and difficulty locating the spots.
- Ideal for Curious Travelers: Those with a keen interest in Rome’s unseen history will get a lot out of this tour.
Getting to the Heart of the Underground Experience

Rome is a city built on layers of history, often visible on the surface through stunning architecture, piazzas, and sculptures. But beneath the streets, there are stories waiting to be uncovered—stories of ancient buildings, underground passages, and lost structures. This tour focuses on two key underground sites—the Stadio di Domiziano beneath Piazza Navona and the Vicus Caprarius near the Trevi Fountain—and offers a peek into Rome’s hidden past.
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The Piazza Navona Underground: Standing on Ancient Ground
Our first stop is the Stadio di Domiziano, an underground section beneath the lively Piazza Navona. Built between 85-86 A.D., this was a masonry stadium used for Roman entertainment, specifically for celebrating a series of competitions called the Certamen Capitolino Iovi. This site is a rare relic: it’s the only example of a masonry stadium in Rome, and exploring it feels like stepping back more than 1,900 years.
The audio guide here is a great addition, offering insights in six languages. It helps contextualize what you’re seeing—like the remnants of the old arena and its significance in Roman culture. Several reviewers appreciated how this part of the tour provided a clear history lesson, with some mentioning how “it was quite interesting to see how the current piazza sits atop of the original stadium.”
However, the experience is relatively brief—about 40 minutes—and some found the process of locating the site a bit tricky. One reviewer said, “The actual location was a bit hard to locate,” which can be frustrating if you’re relying on signage or staff assistance. Still, for those who love to see history in a more intimate setting, this underground peek is worth it.
The Trevi Fountain Passages: Exploring Ancient Water Systems
Next, the tour takes you underneath the Trevi Fountain to explore the Vicus Caprarius, an underground water tank linked to ancient aqueducts. Discovered in 1999 beneath a cinema, this site offers a fascinating look at Rome’s water supply system, which was vital for the city’s growth and development.
Inside, you’ll see remains of an aqueduct-connected water tank, and the experience is enhanced by the audio guide, which provides historical context. Not everyone raved about this part, but many found it intriguing—one review mentions enjoying “the discovery of how the water system worked.” It’s a quiet, shaded space that is perfect for escaping Rome’s busy streets and getting a glimpse of how Romans managed their water supply.
A Self-Guided Tour With Flexibility
What truly sets this experience apart is that it’s self-guided. You receive a voucher, reserve your time, and then explore at your own pace. This means you can linger longer at sections you find most interesting, or move quickly if you’re pressed for time. Many reviewers appreciated the independence this offers, with comments like, “It’s nice that you can go at your own pace” and “both parts were quick to do.”
That said, some found the check-in process less smooth. One review recounts a 20-minute queue and a somewhat abrupt staff member, which could be discouraging if you’re eager to start exploring immediately. Still, once inside, the experience is largely self-directed, making it a good option for travelers who prefer not to be tied to a guide or large group.
The Experience and How It Feels
Imagine wandering beneath some of Rome’s most iconic landmarks—walking through the remains of an ancient Roman stadium, then slipping into the cool darkness of an aqueduct beneath a busy piazza. The quiet, almost contemplative atmosphere of these underground sites offers a stark contrast to the lively streets above. It’s a chance to see the city from a different angle, quite literally.
The sites are indoor, so if you’re visiting on a rainy day or just want a break from the sun, this tour offers a comfortable escape. The audio guides make it easy to learn about what you’re seeing, and the posters and artifacts add visual interest. Several reviewers commented on how “it was nice to get out of the sun” or that “both tours were indoors, perfect for a rainy day.”
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Is the Price Justified?
At a little over $34 per person, the tour is fairly priced. You gain access to two underground sites with audio commentary, which in itself offers good value. However, a few travelers mentioned that some might find it “just okay” for the price, especially if they’re expecting a more guided or comprehensive experience. Since there’s no guided group, and no included extras like food or transportation, it’s best suited for those who enjoy self-guided exploration and are genuinely interested in hidden ruins.
Who Should Consider This Tour?
This experience is ideal if you’re keen on uncovering Rome’s lesser-seen layers. It’s especially good for history buffs, solo travelers, or anyone who enjoys exploring at their own pace. If you’re traveling with kids or have mobility issues, note that some sites are underground and may require some walking and bending, so plan accordingly.
It’s not a rundown of Rome’s ancient sites, but rather a peek beneath the surface. If you’ve already done the major attractions like the Colosseum or Roman Forum, this gives you a fresh perspective.
Final Thoughts: Is It Worth Your Time?
For travelers who value unique experiences and aren’t afraid to explore independently, this underground tour offers a memorable way to see Rome differently. The two sites are historically significant and visually interesting, and the audio guides enhance the storytelling aspect. Plus, the ability to go at your own pace makes it a relaxing break from the often hectic city sightseeing.
However, be prepared for some logistical quirks—like locating the sites and queues at check-in. If you’re someone who enjoys self-guided adventures and is curious about Rome’s hidden layers, you’ll probably find this tour worth the price.
But if you’re after a guided, in-depth narration or a more structured experience, you might prefer other options. Still, for an unusual glimpse beneath the city’s streets, this tour is a fun, budget-friendly choice that adds a different flavor to your Roman holiday.
Rome: Piazza Navona & Trevi District Underground Pass
“A very niche experience, something to do when you've done "all of rome". It was interesting, and both parts were quick to do (40 mins). Don't do i…”
FAQ

Do I need to bring my own guide or audio device?
No, the tour provides an audio guide in six languages, which you can listen to as you explore the underground sites.
Is this tour suitable for children?
While the tour is self-guided, the underground sites involve walking and may be dark or narrow in places. It’s best suited for older children or teens comfortable with underground exploration.
How long does the tour take?
The underground visits are around 40 minutes each, making the total experience approximately 2 hours including some time for moving between sites.
Are there any food or drinks included?
No, food and drinks are not included. It’s purely an underground exploration experience.
Can I cancel or reschedule?
Yes, the tour offers free cancellation up to 24 hours in advance, giving you flexibility if your plans change.
Is this tour physically demanding?
It involves walking and some bending or navigating uneven surfaces underground, so plan accordingly if mobility is an issue.
Where do I meet for the tour?
The meeting point is at the Touristation Navona office at Piazza Navona, 25. Be sure to report there to redeem your voucher.
Can I do this tour if it’s raining?
Yes, since both sites are indoors, the tour is unaffected by weather, making it a good rainy-day activity.
Is this experience worth the cost?
For those interested in underground ruins and exploring beyond the usual landmarks, yes. It offers good value for the unique insight into Rome’s subterranean layers.
In the end, if you’re after something a little different and you enjoy exploring at your own pace, this underground pass can add a special touch to your Roman adventure. Just keep your expectations aligned with what’s offered—an intriguing peek into the city’s hidden past, with some logistical quirks along the way.
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