Strange Growing Stones and Mud Volcanoes in Buzau County

Mud volcanoes and stones, in one day.

This is a rare mix of science-flavored oddities and roadside legend: you’ll go from the Trovanți living stones at Babele de la Ulmet to the cold, gas-driven mud volcanoes near Berca. I love how the stops feel hands-on and visual, with plenty to talk about as you walk. I also like the practical setup, a private air-conditioned vehicle that gets your group there comfortably, with a schedule built around two major sights.

One thing to plan for: you’ll do a hillside walk at Trovanți and the day depends on decent weather. If you come in with stiff shoes or a low tolerance for early mornings, you’ll feel it.

Key things I’d bookmark before you go

• Trovanți at Babele de la Ulmet, famous for round, egg-like shapes and theories about how they formed
• Mud volcano cones near Berca, created by gas pushing up water and clay, then drying at the surface
• Private, air-conditioned transport in a Ford Transit minibus with Terra Voyage branding
• A family-friendly pace, with moderate effort and routes that can work for kids
• English service plus a mobile ticket, so your day stays low-stress
• Admission not included, so you should budget extra for on-site tickets

Strange stones and mud volcanoes in Buzau County: what makes it special

Buzau County is not the kind of place that tries to impress you with marble façades or postcard views. It works differently. You come for the weird. You come to stand close to formations that look almost artificial, then learn why people have been arguing about them for generations.

At Trovanți, the draw is the look: perfectly round or oval stones that resemble eggs or huge shells. The story, though, is even more interesting. You’ll hear how these stones are described as accumulations of sand, sandstones, and cemented marls that were arranged in a circle, formed in the depths of the earth millions of years ago. The explanation focuses on groundwater and the marine life and conditions linked to their formation, and then adds the legends people attach to them, including the idea that they move or grow over time.

At Berca mud volcanoes, it’s the opposite feeling. Trovanți look like geological fossils. Mud volcanoes look like an active process. The cones form when natural gas rises from deep underground (around 3,000 meters), pulling up groundwater and clay. Once that mixture reaches the surface, the clay dries and builds the small volcanic shapes you see on the ground. The mixture stays cold, and the gas is described as not flammable, but you might notice a slightly pungent, sulphurous smell.

That combo is why this tour works. You’re not only seeing two sites. You’re comparing two different ways nature can create something that feels otherworldly.

Getting there comfortably: pickup, private group size, and timing

This is a private tour for your group only, typically up to 7 people. That matters because it keeps the day calmer. You won’t be squeezed into a crowded schedule where you hear nothing and rush everything.

Pickup is offered, and your ride is a white Ford Transit minibus with Terra Voyage branding and the brand Hai in excursie. The vehicle is air-conditioned, which is a big deal for a morning start and a full day out in the countryside. The tour starts at 7:00 am, so expect an early pickup and a prompt departure.

The total time is about 8 to 9 hours. That sounds long until you see how it’s built. You’re not spending the whole time driving. The itinerary gives you meaningful time on-site, with 3 hours at Trovanți and 2 hours at the mud volcano area, plus extra travel and buffer.

Stop 1 at Trovanți (Babele de la Ulmet): living stones and legend

Trovanți are the headline act for a reason. They don’t just look unusual; they look patterned. On arrival at Babele de la Ulmet, you’ll be surrounded by the story of what these formations might be, and why people call them living stones.

What you’ll learn here is grounded in geology but still leaves room for mystery. The common explanation describes them as natural accumulations of sand, sandstones, and cemented marls, shaped in a circle and formed underground over millions of years. You’ll also hear how groundwater and older marine conditions are used to explain the process, including the role of marine animals and the conditions that allowed the material to form the way it did.

Then comes the part that turns this into a cultural experience as well as a natural one. People associate legends to Trovanți, and some say the stones are moving. A widely repeated idea is that they grow every year. Even if you take the legend as legend, it adds energy to your visit because you’re listening to people trying to make sense of something they can see with their own eyes.

The practical side: the physical effort isn’t big. You’ll climb a hillside, but the route is described as accessible to children. That doesn’t mean it’s flat. Wear shoes you trust on uneven ground, and keep your pace steady.

What you’ll like most here is the combination of close-up visuals and explanation. These stones are the kind where you’ll keep noticing details: how regular the roundness can look, how some shapes resemble eggs or shells, and how the whole area has that calm, curious feel that encourages slow looking.

Possible drawback: if you’re expecting a dramatic show with movement, you might find it more contemplative than spectacle. The big payoff is the shapes and the explanations, not active eruptions or anything that changes minute to minute.

Stop 2 at Berca mud volcanoes: cold clay cones from deep underground gas

After Trovanți, the mood shifts. Mud volcanoes feel more energetic, even before you see any cones. You’ll head to the Berca mud volcano area in the Buzau Subcarpathians, where mud volcanoes are considered the most famous and spectacular in Romania.

Here’s the simple version of how they work. Natural gas rises from depths of about 3,000 meters. On its way up, it entrains groundwater or infiltrates clay in the soil. Gases push that mixture upward at different speeds, then once it reaches the surface, the clay dries. Drying is what gives you the volcanic cones. The important detail is that the mixture is cold, and the gas is not flammable. You might still notice a slightly pungent sulphurous odor.

You’ll also connect the dots geographically. The mud volcanoes are linked to a larger area including Beciu, Scortoasa, Paclele, and Berca. Paclele Hill is referenced as the relief feature where, to the west, the muddy volcanoes appear. The tour explanation also situates the terrain with the Buzau Valley to the south and the Policiori-Scortoasa depression to the west, which helps you understand why you’re seeing cones where you are.

Visually, this stop is why the tour gets such strong praise. The formations can feel like they belong in another world, especially when you realize they’re created by a natural process that comes from deep beneath your feet.

What to watch for: the sulphurous smell is mentioned as possible. You don’t need to panic, but you should be prepared. If odors bother you, consider planning to take breaks and breathing through your mouth lightly if needed.

How the 8 to 9 hour day flows, and how to pace yourself

This is designed to be full-day without being exhausting. The schedule gives you two anchors, Trovanți first, then mud volcanoes.

• Stop 1 lasts about 3 hours. That’s enough time to take your time, learn the competing explanations and legends, and still climb the hillside without feeling rushed.
• Stop 2 lasts about 2 hours. That gives you time to see the cone area, walk around, and take in how the ground looks in a way that photographs can’t fully explain.

Because you have both walking and explanation time, plan for a mix of stillness and movement. The day doesn’t demand extreme fitness, but it does require comfort with uneven terrain. That’s why the tour asks for moderate physical fitness and calls out a hillside climb at Trovanți.

My practical advice:

• Wear comfortable shoes with grip.
• Bring water. You’ll be out for most of the day.
• If you’re sensitive to smell, know that a sulphurous odor can appear at the mud volcano area.
• Keep expectations flexible. The most memorable moments here are the slow ones, looking closely at shapes and textures, then connecting them to how the process is explained.

Price and value: what you’re paying for in this private format

The price is $635.17 per group, for up to 7 people. That sounds steep if you’re thinking per person. But in practice, private transport plus a guided, language-supported day changes the math.

If you fill the group size, the effective cost is about $91 per person. If you travel with fewer people, the per-person cost rises, so the value depends on your group size. The best value is when you’re traveling as a compact group of friends or a family cluster.

You should also factor one key thing: admission tickets are not included. That means you’ll likely pay on-site for entry at Trovanți and for the mud volcano visit. Since the tour duration and stops are structured around those two paid sights, budget some extra money even if you already purchased the tour.

Where the value really shows is in the private setup:

• Private group means a calmer pace.
• Air-conditioned transport saves energy for a long day.
• Mobile ticket and English service reduce friction.
• A focused itinerary keeps you from wasting time deciding what to see first.

Who this tour is best for

This is a strong fit for:

• Nature lovers who like geological oddities and hands-on learning.
• Families with kids, since the physical effort is described as not big and the route at Trovanți is accessible to children.
• People who want a private day in Romania without switching cars or navigating confusing segments on their own.
• Anyone who enjoys comparing “what it looks like” with “how it might work,” from Trovanți legends to mud volcano formation.

It may be less ideal if you want a tour that is mostly urban sightseeing, or if you struggle with early starts and hillside walking, even if it’s moderate.

Should you book this Strange Stones and Mud Volcanoes tour?

I’d book it if you want a day that feels genuinely unusual and you like learning while you look. Trovanți give you a brainy, myth-meets-science experience built around round living-stone shapes. Berca mud volcanoes turn the day into a colder, earthy spectacle driven by natural gas and clay.

Skip it only if your main goal is big city sights, or if you dislike guided nature walks and smells. Also consider the weather dependence. This experience requires good weather, and if it’s canceled for poor conditions, you’ll be offered a different date or a full refund.

If your group can handle a hillside climb and you’re traveling early, this tour has the kind of wow factor that sticks, not because it’s flashy, but because it’s strange in a real, physical way.

FAQ

What is the duration of the tour?

The tour lasts about 8 to 9 hours.

What time does the tour start?

The start time is 7:00 am.

Is pickup available, and what vehicle is used?

Pickup is offered. The ride is a white Ford Transit minibus with Terra Voyage and Hai in excursie branding.

Is this tour private?

Yes. It is a private tour/activity, and only your group participates.

What languages are offered?

The tour is offered in English.

Do I need to buy admission tickets?

Admission tickets are not included for both Trovanți and the Berca mud volcanoes stops.

What fitness level do I need?

A moderate physical fitness level is recommended. You will climb a hillside at Trovanți, but the route is described as accessible to children.

What happens if the weather is bad?

The tour requires good weather. If it is canceled due to poor weather, you will be offered a different date or a full refund.

How far in advance should I book?

On average, this tour is booked 67 days in advance.