Réseau du Rupt-du-Puits, Underground cave system in Beurey-sur-Saulx, France
The Réseau du Rupt-du-Puits extends through 17 kilometers of natural galleries, making it the largest underground network in the Paris Basin.
The initial discovery of the cave system occurred in November 1971, when speleologists completed a challenging 400-meter dive through the water-filled passages.
The cave network contributes to scientific research with its geological formations, underground river systems, and diverse cave-dwelling organisms including Niphargus species.
Access to the cave requires obtaining a key through agreements between speleology groups and the National Forest Office of France.
The cave system contains a main siphon that ranks as the tenth longest in France and connects to the Grotte de la Béva through underwater passages.
Location: Beurey-sur-Saulx
Location: Robert-Espagne
Location: Trois-Fontaines-l'Abbaye
GPS coordinates: 48.74442,5.01888
Latest update: June 23, 2025 09:55
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