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Balkans · about 12 km from Mostar

Vrelo Bune (Blagaj)

  • CertificationFull cave
  • Water temperature≈ 7–8 °Cestimated, no reports yet
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The dive

The source of the Buna lies next to the tekija of Blagaj. The water is 7–8 °C and visibility depends on the rain.

Profile and sections

The source of the Buna lies next to the tekija of Blagaj. The water is 7–8 °C and visibility depends on the rain.

The GUE Balkans Cave Exploration Project dived here in July 2010; InDEPTH also lists the spring among the caves around Mostar.

Practical: it is busy with tourists. Depth, access and permission: ask the club in Mostar.

Source: InDEPTH – Drive and Dive in the Balkans ↗Source: GUE – Balkans Cave Exploration Project, July 2010 ↗
Depth and profile
Depth: ask
Configuration
Full cave kit for water of 7–8 °C. Which configuration fits: ask the club.
Who can dive where
  • CaveAt least Full cave
  • Whole caveConfigurations: Backmount / twinset / Sidemount / CCR
Depends on water level or swellPermission needed

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Source: InDEPTH – Drive and Dive in the Balkans ↗Source: GUE – Balkans Cave Exploration Project, July 2010 ↗

How to get there

The spring is by the tekija (dervish house) of Blagaj, a tourist hotspot near Mostar. Access and permission to dive: ask Ronilački klub Neretva.

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Around Vrelo Bune (Blagaj)

FillsNo fill station known nearby
Where to sleepAround Mostar on Booking.com ↗

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Sources, sharing and disclaimer

Sources

Source: InDEPTH – Drive and Dive in the Balkans ↗Source: GUE – Balkans Cave Exploration Project, July 2010 ↗

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Certification requirements, configurations and trimix depths are estimates for planning. Always check them locally and dive within your training. Compiled from the research of 27 Oct 2026 and information from CDC Vrelo (Oct 2026, with the 2026 price list) on diving Vrelo: metla.mk and republika.mk (the Vrelo record, 17 Oct 2026), InDEPTH "Drive and Dive in the Balkans", underwater-3d.com (Matka Vrelo 2025), Wikipedia (Matka Canyon, Blue Eye), the GUE Balkans Cave Exploration Project (July 2010), caverescue.eu and Thalassia Salentina (Kotor, 2005); for Bulgaria, Albania and Montenegro (Oct 2026) the Bulgarian Federation of Speleology's cave registry, 360mag, showcaves.com, X-Ray Mag, Divernet, National Geographic Polska, AKT, Wikipedia, taucher.net, the Czech Speleological Society, RSE, BTA and Pro Diving Montenegro; for Bihać (Nov 2026) Una Aquarius, Wikipedia and OpenStreetMap. Dutch travel advice for North Macedonia, Serbia, Bosnia and Herzegovina, Montenegro, Albania and Bulgaria checked on 27 Oct 2026 (all green). Pins from OpenStreetMap. ~ = estimate, ask = not confirmed. Rules change — check locally.