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Czechia · about 8 km from Blansko

Amatérská jeskyně

Info · exploration

Not open to visiting divers: the sumps lie far into the cave and need a strong team of porters, and the only way in is together with a local caving club of the ČSS, which needs a permit from the Nature Conservation Agency. The cave is listed here as information, not as a dive to plan.

  • CertificationFull cave
  • SpecialExperienced divers
Directions

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Now at Amatérská jeskyně

Status
Closed

The dive

The lowest part of this system is always flooded and can only be explored by cave diving.

Only exploration diving happens here; recreational cave diving does not exist in the Moravian Karst. You reach the sumps only after a stretch of dry cave, climbing with all your gear. Permission from the authorities goes through the Czech Speleological Society (ČSS) and is a lengthy process with a research purpose, in which landowners and other stakeholders also have a say. Even where the water looks easier to reach, you soon dive into the part of the system that needs that permission.
Source: Jan Sirotek, Česká speleologická společnost (gesprek met Jos, november 2026) ↗
Flood danger: on 29 August 1970 two cavers drowned in the Amatérská jeskyně when a violent storm suddenly flooded the system; they had passed a sump earlier that day. The water rose more than 10 m in one place; they were found after four days, and the cave then stayed closed to amateur cavers for 23 years.
Source: ČT24, Aug 2020 ↗
Profile and sections

The lowest part of this system is always flooded and can only be explored by cave diving. In March 2025 the water in the Bílá voda sumps was exceptionally clear (with carp); the first sump can also be turbid with very poor visibility.

Amatérská is the longest cave system in Czechia (~40 km) and forms one system with the Punkevní jeskyně and Macocha. In 2023 two ČSS divers swam from the Sloupský potok via Amatérská and Macocha to the Punkva resurgence (>7 km, ~600 m underwater, 7 sumps, 11 hours, ~40 helpers); in 2025 a traverse followed from the Bílá voda sink in Nová Rasovna (7.5 km, ~1 km underwater, 2 days, ~80 helpers).

Depth and profile
Sumps on the Bílá voda (Belgický sifon, Macošský sifon) and the Sloupský potok; lengths and depths not published · 2023 traverse (7 sumps): the longest 300 m / -20 m, another 80 m / -10 m
Configuration
Not applicable for visitors. The traverses were dived with fully redundant gear and dry sections between the sumps in dive suits.
DPV: Not DPV-suitable (estimate)
Sumps alternating with dry sections, research only: no scooter.
Who can dive where
  • CaveAt least Full cave
  • Whole caveConfigurations: Backmount / twinset / Sidemount / CCR / Small cylinders / no-mount (speleo sumps)
  • Whole caveConfiguration unknown — research beforehand · doesn't decide who may dive
  • Whole caveExperienced divers only · doesn't decide who may dive
Dry sections / haulingExperienced diversDepends on water level or swellPermission 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

Not open to the public apart from the entrance; occasionally the cave is opened for visitors. Excursions only under strict conditions. Only ČSS groups with a permit from the Moravský kras PLA administration (usually valid for 5 years) dive the sumps.

Plan your route ↗

Around Amatérská jeskyně

FillsNo fill station known nearby
Caves nearby2 within 2 km

News

All (1)

Nearby

Articles about cave diving that name a place within 25 km of this site, but no cave by name. They're not necessarily about this site.

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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Sources, sharing and disclaimer

Sources

Current conditions

Visibility, flow and water levels change quickly. Right before your dive, check what other divers report:

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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 web research (Mine Diving CZ/minehraniczna.cz and HP Diving: Nov 2018 diving conditions and safety rules; Javorník town, Kudy z nudy, Deník 2019–2023, DIVE Magazine 2022, minediving.de, dark-team.de, Speleoaquanaut; hranickapropast.cz, Hranice town, Ochrana přírody 2023, ČT24 2019 and 2020, České noviny/ČTK, iROZHLAS and Hanácká Drbna 2026; speleo.cz (ČSS), Czech Geological Survey, Advanced Diver Magazine, turistika.cz, Deník 2023 and 2025; Wikipedia; stranypotapecske.cz; Divecentrum Hradec Králové, Trygon Brno, Zero Gravity; Ostrava City Hospital and Ostrava city; Sept 2026); access to the caves confirmed by a former chief of the Czech cave diving commission (Oct 2026). Pins from Wikipedia, stranypotapecske.cz, HP Diving and turistika.cz. ~ = estimate. Rules change — check locally.