Plizio Visual Lab
Prony Needle

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The Prony Needle, known locally as Aiguille de Prony, is a remarkable underwater stalagmite located in the Prony Bay of southern New Caledonia. Rising approximately 35 meters from the seabed, this limestone monolith comes within centimeters of the surface at low tide. It was formed over millennia by the continuous discharge of mineral-rich water from submarine hydrothermal springs, which gradually deposited calcium carbonate into this towering spike. For scuba divers, the Needle is a legendary site, characterized by its intricate columns and a bustling marine ecosystem. The spire is encrusted with a panoramic array of soft corals, fans, and sponges, providing a sanctuary for a wide variety of tropical fish and crustaceans. Because the bay receives freshwater runoff from nearby rivers, the mixing of waters creates a distinct biological environment that supports rare species. Exploring this underwater cathedral gives a profound glimpse into the geothermal forces that continue to shape the lagoon's diverse natural landscape.
- Location: New Caledonia
- Top sights: Ruine de la penitentiaire Baie nord · Mine Cobalt · Vestige ancien pont voie ferré
- Nearby: Prony (6 km)
Best time to visit & climate
The most pleasant time to visit is Aug–Oct.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg °C | 26 | 26 | 26 | 25 | 23 | 22 | 21 | 21 | 21 | 22 | 23 | 25 |
| Rain mm | 120 | 104 | 165 | 113 | 97 | 79 | 73 | 65 | 46 | 49 | 68 | 79 |
📋 Practical info
Geography
Facts
- Underwater limestone chimneys
- Rise about 20 meters from the seabed
- Formed by hydrothermal spring activity
- Located within Prony Bay
- Estimated to be several thousand years old
- Popular dive site for biological studies
Explore nearby
Notable places around
Route planner — Car & Motorhome
Where do you start? We build the route here, with stops and country notes along the way.
© OpenStreetMap contributors · OpenRouteService
Sights in the town Prony Needle (3)
Vestige ancien pont voie ferré
Remains of an old railway bridge, evidence of the industrial past.
Sights nearby
Frequently asked questions
What exactly are the Aiguilles de Prony?
Can you dive at Aiguilles de Prony?
How deep are the formations?
Do you need a diving certification?
What marine life can you see there?
Prony Needle: where is it located?
Prony Needle: what is there to see?
Prony Needle: when is the best time to visit?
Prony Needle: why is it worth visiting?

























