Physical Address
304 North Cardinal St.
Dorchester Center, MA 02124
Physical Address
304 North Cardinal St.
Dorchester Center, MA 02124

Explore a unique freediving adventure in Tallinn, swimming through a submerged prison with eerie forests and abandoned buildings—an unforgettable experience.
Imagine swimming through a forgotten, submerged world where a once-operational prison now lies beneath the waters, revealing its haunting structures, forests, and high fences. That’s exactly what the Freedive in Sunken Prison tour offers near Tallinn, Estonia. Touted as a truly one-of-a-kind experience, this activity combines the thrill of freediving with the eerie beauty of an abandoned site turned underwater playground.
What we love most about this tour is the way it transforms what might seem like a bleak relic into an adventurous, almost surreal experience — floating past submerged buildings and forests, inside abandoned houses, and beneath high fences. It’s a perfect match for those craving something off the beaten path and eager to explore a location that’s both historic and visually arresting.
One possible consideration is that this activity requires a moderate level of physical fitness and comfort in water, which might not suit everyone. Plus, it’s a private tour limited to your group, so it’s ideal for those wanting a personalized experience but less suitable for large crowds or solo travelers.
This freediving trip is best suited for adventure seekers, underwater photography enthusiasts, or anyone curious about Estonia’s unusual sites who doesn’t mind a bit of exertion and loves a story worth sharing.

Looking for more options in Tallinn? Here are some other experiences worth considering.
The tour takes place in Tallinn, Estonia, at a site known as Rummu Quarry, where a former prison site was flooded after operations ceased. Today, the site is famous for its fascinating underwater landscape — a mixture of submerged buildings, machinery, and even a sunken forest, all visible during your freediving adventure.
This location offers a blend of eerie abandonment and natural beauty. Reviewers describe it as “otherworldly,” with depths reaching up to 14 meters, allowing for varied exploration. The underwater structures include houses and fences, giving off the vibe of a ghost town that has been reclaimed by water.
You’ll meet in Tallinn and be driven to the site, which is about a short trip out of the city. The experience is approximately 4 hours in total, with the actual freediving sessions spanning most of that time. The tour includes pickup and the convenience of a mobile ticket, making logistics straightforward.
The core activity involves several dives, with your guide (like Taniel) helping you navigate and stay safe throughout. The reviews highlight the professionalism and attentiveness of the guides, who go out of their way to ensure comfort, including offering refresher courses if needed.
While the tour is suitable for most with moderate physical fitness, it does require comfort in water and some basic freediving skills. The guides are described as loyal and safety-conscious, ensuring that each participant feels comfortable. This is especially important given the depth of up to 14 meters noted in reviews.
Taniel, one of the instructors, receives high praise for his professionalism and personalized approach. He provides refresher courses and guidance, making sure everyone is comfortable, even if new to freediving. This high level of attention is one of the reasons the tour scores a perfect 5/5 from reviewers.
At $279.26 per person, the tour is priced in the mid-range for specialized activities, but considering the unique location and expert guidance, many find it to offer excellent value. It’s a 4-hour adventure that feels substantial and well-organized, with small group sizes ensuring personal attention.
Booking on average about 8 days in advance suggests it’s popular but not over-subscribed, and the ability to cancel for free up to 24 hours beforehand adds flexibility.
One reviewer described the site as “really unique,” emphasizing its otherworldly appearance underwater. Another noted that “the depth reaches up to 14m,” which provides enough space for varied exploration and makes for fantastic photos.
The guides’ attentiveness also stood out. As one reviewer shared, Taniel “went out of his way to provide a refresher dive course and ensure I was comfortable throughout,” highlighting the importance of safety and personalized attention in such an activity.
If you enjoy adventure-based travel or are curious about Estonia’s lesser-known sites, this tour offers a mix of history and thrill. It’s perfect for underwater photography enthusiasts seeking atmospheric shots of submerged structures, or anyone wanting an experience that’s visually stunning and slightly haunting.
However, those uncomfortable in water or with mobility concerns might want to consider their comfort level, as the activity involves diving into depths up to 14 meters.
This freediving adventure is a rare opportunity to explore an underwater relic with the guidance of experienced instructors. It offers a blend of history, nature, and adrenaline, making it ideal for adventure travelers, culture curious, or photographers wanting an extraordinary underwater canvas.
The value for the price is evident in the personalized guidance, access to a unique submerged site, and the chance to experience something most visitors never even hear about. It’s best suited for those comfortable with water activities and looking for an activity that’s both thrilling and memorable.
In short, if you’re after a quirky, visually arresting experience in Estonia that’s far from typical, this tour is an excellent choice. Just prepare to get your fins wet and enjoy one of the most unusual sights you’ll ever see underwater.
Is this a beginner-friendly freediving experience?
Yes, as long as you have a moderate fitness level and are comfortable in water, you should be fine. Guides like Taniel are attentive and provide refresher courses if needed.
How long does the tour last?
The entire experience is approximately 4 hours, including transportation, briefing, and diving time.
What is the depth of the dives?
The deepest dives can reach up to 14 meters, offering ample space to explore submerged structures and forests.
Do I need to bring my own equipment?
The tour likely provides necessary gear, but you should confirm this when booking. Bring water-friendly attire and be prepared for physical activity.
Is transportation included?
Yes, pickup is offered, making it convenient to reach the site from Tallinn.
Can I cancel the tour if my plans change?
Yes, free cancellation is available up to 24 hours before the scheduled start.
What if I am a complete beginner?
While some experience helps, the guides are professional and supportive, and refresher courses are available for those who need them.
Is it suitable for children or teenagers?
The experience is geared toward adults with moderate fitness. You should check age restrictions directly with the provider.
Are there any safety concerns I should know?
Guides are safety-conscious and experienced. As with any freediving activity, comfort in water and following instructions are essential.
How do I book this experience?
Book in advance via the provider’s platform or email, with an average booking window of about 8 days.
To sum it up, the Freedive in Sunken Prison tour near Tallinn offers an exceptional opportunity to combine adventure, history, and striking visuals in one memorable outing. It’s perfect for those seeking a once-in-a-lifetime underwater experience in a setting unlike any other.