The Austrian record spans Lower Austria, Upper Austria, Salzburg and Styria. Historic published values are retained where later exploration has not been formally published; they are research metrics, not an access list.
Pießling-Ursprung
Region: Upper Austria / Warscheneck
Type: Karst spring / multi-sump cave
Scale: Dry cave 1,461 m excluding underwater sections; S1 ~200 m / -80 m; S2 ~120 m / -40 m
Status: DIVING PROHIBITED / PROTECTED
Exploration: First dives 1962; Jochen Hasenmayer S1; Robert Seebacher S2
KCore note: One of Austria’s largest karst springs; underwater parts only partly explored.
Gollinger Schwarzbachquelle
Region: Salzburg
Type: Deep karst resurgence
Scale: Historic ~230 m / -76 m
Status: RESEARCH / ACCESS VERIFY
Exploration: Michael Meyberg
KCore note: One of Austria’s deepest spring-diving records.
Hirschbrunn
Region: Upper Austria / Dachstein
Type: Narrow intermittent spring
Scale: ~110–120 m; historic -72 m, later ~-80 m reported
Status: RESEARCH / EXTREME
Exploration: T. Behrend and later teams
KCore note: Very tight vertical phreatic geometry and continuing frontier.
Palfauer Wasserloch
Region: Styria / Gesäuse
Type: Large variable karst spring
Scale: Historic ~170 m / -71 m
Status: RESEARCH / EXTREME
Exploration: R. Kritz / M. Göksu
KCore note: Strong current and rapid discharge changes define the site.
Brunneckerhöhle - Riesensiphon
Region: Salzburg / Tennengebirge
Type: Major internal siphon
Scale: ~340 m / -65 m
Status: RESEARCH / EXPEDITION
Exploration: F. Poggia
KCore note: Major Salzburg submerged cave record.
Hirlatzhöhle - Kesselsiphon
Region: Upper Austria / Dachstein
Type: Internal expedition sump
Scale: ~460 m / -64 m
Status: EXPEDITION / PERMIT
Exploration: J. Encev and earlier teams
KCore note: One of Austria’s longest published siphons inside the 113 km-class Hirlatzhöhle.
Hirlatzhöhle - Seetunnelsiphon
Region: Upper Austria / Dachstein
Type: Internal long sump
Scale: ~345 m / -35 m
Status: EXPEDITION / PERMIT
Exploration: Michael Meyberg
KCore note: Opened major new cave beyond the submerged section.
Koppenbrüllerhöhle
Region: Upper Austria / Dachstein
Type: Show cave + research sump system
Scale: ~4.5 km system; Krakensiphon ~200 m/-20 m; Bläsersiphon ~155 m/-42 m; Schräger Otto ~135 m/-30 m
Status: SHOW CAVE + RESEARCH SECTORS
Exploration: Hasenmayer, Meyberg and later teams
KCore note: Multiple historically important siphons in a major Dachstein water cave.
Feistringgrabenhöhle
Region: Styria
Type: Submerged continuation
Scale: ~147 m / -59 m
Status: RESEARCH / ACCESS VERIFY
Exploration: M. Schafheutle
KCore note: Significant Styrian submerged cave.
Nestelberg-Quelle
Region: Lower Austria
Type: Deep spring
Scale: ~120 m / -58 m
Status: RESEARCH / ACCESS VERIFY
Exploration: M. Schafheutle
KCore note: Deep source in the Lower Austrian limestone Alps.
Erlauf-Ursprung
Region: Lower Austria
Type: Karst resurgence
Scale: ~180 m / -57 m
Status: RESEARCH / ACCESS VERIFY
Exploration: M. Schafheutle
KCore note: One of Lower Austria’s major deep spring dives.
Steinbachquelle
Region: Lower Austria / Hollenstein-Ybbs
Type: Karst spring
Scale: ~150 m / -31 m historic
Status: CLOSED/RESTRICTED - VERIFY
Exploration: F. Galle / W. Halada / O. Schuch
KCore note: Two divers died here on 15 April 1984; accident history is treated respectfully.
Lochbach-Höhle
Region: Lower Austria
Type: Underwater cave
Scale: Historic published underwater penetration ~160 m; later work underrepresented in summaries
Status: RESEARCH / ACCESS VERIFY
Exploration: S. Kucsko / M. Fischer / P. Böhm
KCore note: One of the longest historic Lower Austrian siphon records.
Miralucke / Myralucke
Region: Lower Austria
Type: Episodic water cave
Scale: 306+ m total; Fenstersiphon ~20 m and Teimersiphon ~15 m
Status: NATURAL MONUMENT / ACCESS VERIFY
Exploration: Multiple local teams
KCore note: Water-filled continuation remains; source of Mirabach/Myrafälle.
Trockenes Loch - Seufzersiphon
Region: Lower Austria / Pielach
Type: Internal sump
Scale: ~130 m / -26 m
Status: RESEARCH / ACCESS VERIFY
Exploration: R. Bernstein
KCore note: Hydrological pair with Nasses Loch.
Nasses Loch
Region: Lower Austria / Pielach
Type: Active water cave
Scale: Site-specific
Status: RESEARCH / ACCESS VERIFY
Exploration: Regional cave teams
KCore note: Hydrological counterpart to Trockenes Loch.
Wassermannsloch / Schwarze Lacke
Region: Styria / Hochschwab
Type: Spring cave with permanent entrance sump
Scale: 1,084 m total (2014); entrance sump ~186 m / -27 m
Status: PRIVATE / RESEARCH / ACCESS VERIFY
Exploration: Aquarius project from 1995; F. Schierl / M. Luks
KCore note: One of Austria’s longest caves behind a permanent sump.
Rettenbachhöhle / Teufelsloch
Region: Upper Austria / Sengsengebirge
Type: Flood-prone water cave
Scale: ~1.2 km historic survey; second siphon ~90 m
Status: PROTECTED / RESEARCH
Exploration: Robert Seebacher and teams
KCore note: Highly flood-reactive cave with hydrology and rescue relevance.
Radaubach-Ursprung
Region: Upper Austria
Type: Spring cave
Scale: First sump 91 m; crossed in 2008
Status: RESEARCH / ACCESS VERIFY
Exploration: Robert Seebacher
KCore note: Short submerged section unlocked flowing dry canyon beyond.
Miesenbach-Ursprung
Region: Upper Austria / Salzkammergut
Type: Spring cave
Scale: 75 m submerged; ~-14 m in 2007 report
Status: RESEARCH / ACCESS VERIFY
Exploration: Robert Seebacher
KCore note: Measured submerged spring passage.
Offensee Lochbachloch
Region: Upper Austria
Type: Spring cave with post-sump continuation
Scale: 69 m dive / 249.7 m total after 2007; ~-4.9 m
Status: RESEARCH / ACCESS VERIFY
Exploration: Robert Seebacher
KCore note: Modest depth but important post-sump discovery.
Rötelseehöhle
Region: Upper Austria
Type: Alpine cave / submerged route
Scale: ~300 m main-line penetration and ~40 m depth in 2009 project; 5°C water
Status: PERMIT / SPECIALIST
Exploration: GUE-associated project
KCore note: Alpine carry logistics are central: ~200 vertical m mountain approach.
Lamprechtshöhle / Lamprechtsofen
Region: Salzburg
Type: Large Alpine cave / flood-prone show section
Scale: Large system; water hazards at low entrance
Status: SHOW CAVE + RESEARCH
Exploration: Multiple generations
KCore note: 1991 rescue involved a 17-person team including two divers; recurrent flood entrapments remain instructive.
Lurgrotte
Region: Styria
Type: Major water cave / show cave
Scale: ~10 km system
Status: SHOW CAVE + RESEARCH
Exploration: Historic and modern speleological teams
KCore note: 1894 flood rescue involved more than 1,000 helpers and a diver from Trieste.