Romania

Romania’s Speologie.org register lists 248 siphons in 95 caves and about 6.99 km of explored submerged passage as of September 2026. More than half of the recorded siphons have been passed; dozens remain continuing or undived.

The country is overwhelmingly caver-first. Divers cross sumps inside active caves, carry gear to remote resurgence projects and descend deep vertical systems before the scuba part begins.

Tăuz is a four-siphon expedition system rather than one deep spring dive. Historic work progressed from László Czakó in 1982, through Lubomír Benyšek and Wiktor Bolek’s Polish teams, to the Romanian-Finnish breakthrough of 2014.

In 2014 Sami Paakkarinen and Patrik Grönqvist passed the deep second siphon, explored dry passage, crossed a short third sump, then transported an aluminium ladder through the ~85 m-deep route to pass a four-metre dry waterfall and reach Siphon 4. S4 now has roughly 300 m of explored line to about 60 m and continues.

On 4 October 2002 Polish diver Rafael Stanislaw Garski died during deep exploration in Siphon 2; his body was located around 78 m during the subsequent search.

Avenul de sub Vârful Grind reached a sump around -775 m in 2019. Radu Puşcaş passed it in 2022: only about six metres long and less than one metre deep, but extremely restrictive.

In 2023 hoses were installed so the sump could be partially drained and dry exploration continued below it. The 2025 expedition reached the ~-804 m zone and found another flooded continuation. A new expedition is scheduled for 19 September-4 October 2026, after this catalogue draft.

Movile Cave near Mangalia is only about 240 m long, with roughly 40 m of lower flooded level and three air bells, but its scientific importance is global. Oxygen falls strongly, carbon dioxide rises, and the water contains hydrogen sulfide and methane; below the surface film the water becomes effectively anoxic.

The ecosystem is powered by microbial chemosynthesis and contains many cave-adapted endemic invertebrates. Movile is strictly research-only and should never be presented as a sporting cave-diving destination.

Romanian cave rescue has a clear legal national framework under Law 402/2006. County services in karst regions are organised for cave rescue, while specialist training includes underground rivers, pumping, diving and rescue beyond siphons.

• ›Tăuz, 4 Oct 2002 — Rafael Stanislaw Garski died during deep S2 exploration; body found around 78 m.
• ›Isverna, 15 Nov 2002 — two visitors died in an aerated active-water section between flooded sectors.
• ›Isverna recovery, 16 Nov 2002 — Romanian cave-rescue/diving personnel completed a technically difficult recovery.
• ›Grind 2022-23 — planned speleodiving support opened post-sump dry exploration rather than responding to an accident.

• ›Izbândiş — active exploration / local coordination; do not infer tourist access.
• ›Tăuz — expedition site with local club contact and serious accident history.
• ›Isverna — controlled visit history; historic rules required local guide accompaniment for visitors.
• ›Grind — expedition only; extreme vertical access.
• ›Movile — strict research only; no recreational instructions or access promotion.
• ›Flooded mines/quarries — no established national sport-mine scene verified in this research pass; do not invent one.