Nettlebed Cave, Limestone cave in Mount Arthur, New Zealand.
Nettlebed Cave is an extensive limestone cave system in Mount Arthur on New Zealand's South Island, with over 40 kilometers of surveyed passages. The network contains multiple chambers, underground streams, and geological formations spread across several vertical levels.
The cave was first discovered in 1969 and explored between 1979 and 1984 through five consecutive Christmas expeditions. These expeditions led to the mapping of additional 20 kilometers of passages and the discovery of further underground areas.
The cave network holds significance for geological research, providing scientists with opportunities to study underground ecosystems and natural water systems.
Access requires specialized equipment and experienced guides, as the system contains narrow passages, water-filled sections, and vertical drops. Visitors should be prepared for uneven underground conditions and good physical fitness.
In 2014, the cave was connected to Stormy Pot, creating one of the deepest cave systems in the Southern Hemisphere. The combined depth from the upper entrance reaches about 1,180 meters, making it a remarkable depth record for the region.
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