Sauerland
Besucherbergwerk Kleinenbremen (Blaue Lagune)
Closed to divers
Diving in the mine is suspended indefinitely (at least since 2023; confirmed by the mine in November 2026).
- Max depth20 m
- CertificationCavern
- SpecialFlooded mine or quarry
Diving and fills
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Now at Besucherbergwerk Kleinenbremen (Blaue Lagune)
What it looks like
Tauchen im Bergwerk Kleinenbremen Tauchen im Bergwerk Kleinenbremen Tauchen Im Bergwerk Kleinenbremen 2015 Tauchen Bergwerk Kleinenbremen Dez. 2016
All 5 videos and posts
Videos and posts
From other divers, via YouTube, Instagram and Facebook. They only load when you click; after that, Google's or Meta's privacy rules apply.
Tauchen im Bergwerk Kleinenbremen Tauchen im Bergwerk Kleinenbremen Tauchen Im Bergwerk Kleinenbremen 2015 Tauchen Bergwerk Kleinenbremen Dez. 2016
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The Baltic Divers
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Other people's footage, not advice: how someone else dives here says nothing about what suits your team. Dive within your training.
The dive
The 'Blaue Lagune' is an underground lake in a former ore mine, now a visitor mine. The water is 7–8 °C and visibility very good.
Profile and sections
The 'Blaue Lagune' is an underground lake in a former ore mine, now a visitor mine. The water is 7–8 °C and visibility very good.
Practical: the requirements in 2017 were min 50 (cold-water) dives, a cavern card (recommended), a medical and insurance; two dives cost €69. A 2023 list reports diving here as suspended; the mine's website no longer mentions diving, and the museum is closed until 2028.
- Depth and profile
- Underground lake to ~-18/-20 m (taucher.net: -15 m): a chamber ~90 m wide with a ~9 m high roof; at its end chutes into old ore-haulage drifts of ~2 × 2.5 m and a ~80 m tunnel with a line.
- Configuration
- Drysuit with 2 separately closable valves, at least 2 lights, cold-water gear; helmet above water in the mine. Full cave was required for the drifts.
- DPV: Not DPV-suitable (estimate)
- Small underground lake — no need for a scooter; diving is suspended anyway.
Who can dive where
- At least Cavern
- Configurations: Backmount / twinset / Sidemount / CCR / Small cylinders / no-mount (speleo sumps)
- Goes down to 20 m (trimix or deco may be needed)
This is how the planner decides who in your team may dive this cave. Rules your own trip adds (organizer, a mail, the AI) show with your trip.
How to get there
When diving was still offered: fixed dates only, once a month with max 10–15 divers, often booked out months ahead (dive school Trevpunkt). By mine train ~800 m into the mine, the last ~150 m on foot; between dives back by train to change cylinders.
Around Besucherbergwerk Kleinenbremen (Blaue Lagune)
FillsNo fill station known nearby
News
Access and rules change: check what applies locally right before your trip. Source: GDELT Project and the news feeds of diving magazines. Search for more news ↗ Searched automatically, last on 13 Nov 2026.
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