1 mine · down to 70 m
Mine diving in Slovakia
- Mine1
- Max depth70 m
- Water temperature4–6 °C
- Dive centres1
Diving and fills
Dive here with
Why come here
In the Slanské vrchy hills between Prešov and Košice lie the Dubník opal mines: almost 5 km of flooded mine tunnels down to about -70 m, with walls covered in colourful mineral crusts. You dive here only guided by OpalDivers, the official operator, and only with a full cave certification; book well ahead. The water is 4–6 °C, so a heated drysuit is advisable. Soft sediment on the walls and ceiling ruins visibility quickly, which makes good buoyancy and personal line marking essential. Opal is state property: take nothing.
Don't miss
- Opálové bane Dubník (Slovak opal mines): orange limonite stalactites and mining remains over 100 years old in the world's first opal mines, with written records since 1597.
On a rest day
- Slovak opal mines: A guided walk of about a kilometre through the dry galleries from the Jozef adit, about how precious opal formed and was mined.
- St. Elisabeth Cathedral: The Gothic cathedral of Košice is the largest church in Slovakia.
- Spiš Castle: The sprawling castle above Spišské Podhradie has been on the UNESCO World Heritage List since 1993.
All 1 mine
| Site | Max depth | Type | Certification |
|---|---|---|---|
| Opálové bane Dubník (Slovak opal mines)Not known yet · Full cave | 70 m | Not known yet | Full cave |
Certification requirements, configurations and trimix depths are estimates for planning. Always check them locally and dive within your training.
Map
Dive centres and fill stations
1 dive centres, fill stations and instructors
OpalDivers
Štôlňa Jozef, Červenica 198
Guided dives: Opálové bane Dubník (Slovak opal mines)
Official diving operator of the Slovak opal mines: private guided dives for certified full cave divers, groups of 1 to 4 divers. Package prices per group, not per person: 2 dives €950, 3 dives €1450 (with a tour of the dry parts), 4 dives €1550. Lodging, transport and photo/video on request.
Order: partners first, clearly marked as partner; then dive centres by distance from Červenica and independent instructors by name. Not a recommendation: check what they offer yourself.
On this list, or should you be? Get a free partner card →Where to stay
Find a place near Červenica, Prešov, Košice
Villages that work well as a base for the caves in this region. Find a place for your team:
- ČervenicaBooking.com ↗
- PrešovBooking.com ↗
- KošiceBooking.com ↗
The links to Booking.com are affiliate links: if you book through one, DiveTripPlanner earns a small commission. You pay the same.
Practical info: rules, fills and emergency numbers
Emergencies
- 112; DAN Europe +39 06 4211 5685.
Access and rules
- Access: diving in the opal mines is only possible through OpalDivers, the official diving operator, and only guided, with a full cave certification. Book well in advance.
Gas and fills
- Gas: no public fill station for trimix or oxygen confirmed in the region; ask OpalDivers, who offer complete diving services.
Water and season
- Water: 4–6 °C. A drysuit with heating is advisable; the tunnels of the mine itself are ~5 °C.
Rest day
- Rest day: a tour of the dry tunnels of the opal mines (visitor centre at the Jozef adit), ~20 km from Prešov and ~23 km from Košice.
Good to know
- Opal is a reserved mineral and state property: take nothing.
News
No recent news found about the caves in this region.
Searched automatically, last on 5 Nov 2026.
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