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🏛️ DépartementHaute-Saône (70)
📍 TownAnjeux
📌 Cave GPS47.878090, 6.231579
🅿️ Parking GPS47.875659, 6.226052
↕ Max. depth−32 m
↔ Development±185 m
🗺️ TopoCatamaran / J. Moine
Character of Source du Planey
Source du Planey lies hidden in the forest near Anjeux. Beneath its striking spring basin is a relatively short but technically demanding underwater cave. From the entrance, the passage first descends to about −17 metres, then rises towards −6 metres. Farther on, the system becomes more complex and descends through deeper passages to the known endpoint, approximately 185 metres from the entrance at a depth of −32 metres.
Exploration dates back to 1969. The cave was investigated progressively in subsequent years. In 1973, explorers reached the terminal area at about 153 metres and −25 metres; in 1978, additional side passages were explored and a survey was produced. In 1993, J. Moine extended the known passage to 185 metres and −32 metres. The known endpoint lies at an unstable boulder choke.
⚠️ Warning: Source du Planey is not a recreational open-water dive site. A municipal warning sign at the spring identifies the sinkhole as dangerous and sets out requirements for exploration. Always check current local procedures and conditions before diving.
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© Ron Freijer · All photos and videos on this page
🗺️ Topografie Source du Planey
The survey shows the developed profile of Source du Planey, including key depths and the known endpoint.
Survey: Catamaran 1978 (Grime / Siméon), J. Moine 1993.
Copyright: the survey is historical source material. freijer.eu does not claim copyright over the original survey content or drawing. Source and author credits have been retained.
🗺️ Location
Anjeux · Haute-Saône, France
📍 Open in Google Maps →ℹ️ Practical information
🚗ParkingPark at the indicated location by the forest.
🚶Walking distance±500 m along a forest path to the spring.
🌲AccessVia a forest path, which may be muddy depending on the weather.
🌊EntryVia the large spring basin.
⚙️EquipmentFull cave-diving equipment.
🏛️NotificationCheck current local regulations and notification procedures beforehand.
🛵DPVNo.
📚 Sources & attribution
- Historical documentation “Source du Planey” — exploration records from SC Dijon (1969), further exploration in 1972/1973, GS Catamaran (1978) en J. Moine / ASHVS (1993).
- Topografie Catamaran / J. Moine — technical data, passage length, depths and the known endpoint of the system.
- Own location data and photographs — GPS coordinates and practical information for this page.
Practical details about parking, walking distance and GPS coordinates are based on the location information supplied for this page. Cave conditions, access and local rules may change; always check them before diving.