Best for advanced divers, 5-70m, shore entry, mild current.
Jozef Tunnel is a flooded industrial tunnel located within the Slovak Opal Mines. This technical freshwater site offers an overhead environment with depths ranging from 5 to 70 metres. Divers experience mild currents and visibility that fluctuates between 5 and 20 metres. Due to the cold water temperatures of 4 to 5°C and the confined nature of the tunnel, this site is strictly for advanced divers with full cave certification. Shore entry is available, and the site is supported by on-site facilities including a dive shop, cafe, and parking. Divers must manage gas planning carefully for this deep, closed overhead environment.
48.90440, 21.46140
Full cave certification is a hard requirement, not a recommendation, so bring documentation and confirm your gas planning accounts for the rule of thirds in a closed overhead at depth. Parking, a café, and a dive shop are on site, making this a practical base for multi-dive days.
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Expected in this region. No sightings logged here yet.
Depth
5-70m
Visibility
5-20m
Skill Level
Advanced
Entry
Shore
Current
Mild
Typical Dive
60 min
No nearby dive sites found within 50km.
This site is for advanced divers only, and full cave certification is a hard requirement.
The site reaches depths between 5 and 70 metres.
Access to the tunnel is via shore entry.
The water is cold, ranging from 4 to 5°C, with mild currents and visibility between 5 and 20 metres.
No, this is a technical cave diving site and is not suitable for snorkelling.
Diving at Jozef Tunnel in Zámutov requires the following certifications: Cave, Technical, Full Cave. Always dive within your training limits.
