Slănic Prahova Salt Mine & Mud Volcanoes: Private Tour
Descend 208 meters to breathe healing salt air in vast underground chambers.
A private tour from Bucharest to Slănic Prahova Salt Mine and the Mud Volcanoes combines two rare geological sites in one day. You descend into Europe's largest salt mine, where cathedral-like chambers hold 2.9 million cubic meters of salt and maintain a constant 12°C year-round, then travel to Buzău County to watch cold mud and gas erupt from the earth in cone-shaped formations. A professional English-speaking guide leads the route. Hotel pickup and an air-conditioned vehicle are included.
Options for this experience
2 optionsStep-by-step itinerary
Visit salt mine and mud volcanoes
- Explore Slănic Prahova Salt Mine
- Visit Supernova Planetarium inside mine
- Travel to Mud Volcanoes in Buzău County
- Observe mud volcano eruptions and landscape
- Unirea Salt Mine 2h
- Vulcanii Noroiosi (Muddy Volcanoes) 1h
What’s included
- Private transportation in an air-conditioned vehicle.
- professional tour guide fluent in English.
- hotel pickup and drop-off from Bucharest.
- Wednesday to Sunday 07:30 08:00
Information
Private tour from Bucharest to Europe's largest salt mine 208 meters underground, then to the Mud Volcanoes' cold, bubbling craters in Buzău County.
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The experience
The Slănic Prahova Salt Mine sits 208 meters below ground across 53,000 square meters of excavated space divided into 14 trapeze-shaped rooms, each opening at the base to 32 meters wide and rising 45 meters high. The air stays at 12°C year-round due to natural ventilation, and the salt aerosols in that air carry therapeutic properties: the mine operates a sanatorium for asthmatic patients receiving specialized care. Inside the mine you'll see salt sculptures, games and exhibitions, and the Supernova Planetarium, Romania's largest with a 16-meter spherical screen and 4K laser projectors, which runs immersive shows underground.
From there the tour moves to the Mud Volcanoes in Buzău County, a geological and botanical reservation where gas erupting from 3,000 meters deep pushes salty mud and water toward the surface. As the gas bubbles up through clay and water layers, it forces the mud above ground, where it dries into small cone-shaped structures a few meters high: a lunar-like landscape of tiny craters bubbling with cold mud in a barren setting. The mud itself stays cold because it originates in the continental crust layers, not the mantle.
The full route takes 11 hours and includes private transportation in an air-conditioned vehicle, a professional guide speaking English, and hotel pickup and drop-off from Bucharest. The tour suits all fitness levels, though the salt mine's underground depth and constant cool temperature are worth noting if you're sensitive to cold or confined spaces.
Top questions
What languages is the tour guided in?
Live guide in English and Romanian.
How deep is the Slănic Prahova Salt Mine and what's inside it?
The mine sits 208 meters underground across 14 large rooms carved from 2.9 million cubic meters of salt. You'll see salt sculptures, exhibitions and games throughout the chambers, and the Supernova Planetarium, Romania's largest, runs immersive shows on a 16-meter spherical screen inside the mine itself.
What are the Mud Volcanoes and how do they form?
The Mud Volcanoes in Buzău County are small cone-shaped structures created when gas erupting from 3,000 meters deep pushes salty mud and water toward the surface. The mud dries into solid formations a few meters high, and you'll see tiny craters actively bubbling with cold mud across a barren, otherworldly landscape.
What's the temperature like underground in the salt mine?
The salt mine maintains a constant 12°C year-round due to natural ventilation, so bring a light jacket or sweater even if it's warm outside.
Does the tour include meals or entrance fees to the sites?
The tour includes private transportation, guide and hotel pickup. Entrance fees to the Mud Volcanoes (20 RON, cash only) and the optional Unirea Salt Mine (55 RON) are separate. Lunch is not included.
Operated by Supplier. Explorevia does not run this tour: we compare it with similar options, and you book it with our booking partner.
Prices and times updated 6 days ago
Slănic Prahova Salt Mine & Mud Volcanoes: Private Tour
11h · EN +1 · at your hotel
from US$ 178 per person
Next, you choose your date and number of travelers and see the final price.