Alba Regia Cave, Natural limestone cave in Tési Plateau, Hungary
Alba Regia Cave is a limestone cave in the Bakony Mountains with over 3600 meters of passages descending to depths of 200 meters below the surface. The system includes multiple connected branches and vertical shafts formed by water erosion through the rock.
The cave was discovered in 1975 by researchers from the Alba Regia Cave Research Group who found its entrance through a temporary sinkhole. This discovery opened one of the country's larger underground systems to scientific study.
Local speleologists named the cave passages based on their physical characteristics, including the distinctive cloverleaf-shaped erosional corridor in the main branch.
Visiting requires permission from the Duna-Ipoly National Park Directorate and proper training in cave exploration for safety reasons. Preparation is essential as the system is demanding and needs specialized equipment and experience.
The cave system has multiple shafts where carbon dioxide builds up to concentrations around 4 percent, which affects how deep explorers can safely venture. This natural gas accumulation is a key factor that must be considered on every expedition.
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