Plunging a staggering 1,733 metres into the Earth’s crust, Gouffre Mirolda is the deepest known cave in France and the third deepest on the planet. Hidden beneath the Savoy Alps near the Swiss and Italian borders, this subterranean giant represents one of the most extraordinary feats of modern speleology — an extreme vertical labyrinth that few humans will ever see. While recreational access is strictly limited to experienced cavers, Gouffre Mirolda stands as a monument to the mysterious world beneath our feet.
Quick Facts: Gouffre Mirolda
- Location: Near Samoëns, Haute-Savoie, French Alps
- Depth: 1,733 metres (5,686 feet)
- Discovered: 1971; reached world-record depth of 1,610m in 1998
- World ranking: 3rd deepest cave globally (after Krubera Cave and Snezhnaya Cave, both in Georgia)
- Access: Restricted to experienced speleologists with permits; no tourist access
- Challenge level: Extreme — multi-day underground expeditions required
Gouffre Mirolda is the deepest cave of France, located in the Savoy Alps, in the village of Samoëns, near the Italian and Swiss borders.
In 1998, the French-English team got to a depth of 1626 meters after staying underground for almost 103 hours and the cave at that moment became the deepest cave in the world. New measures and explores have been done on January 2003, and the depth of this cave has been increased to 1733 meters. This makes it the 3rd deepest cave in the world (after the Krubera (Voronja) Cave in Georgia – 2191m and Illyuzia-Mezhonnogo-Snezhnaya Cave in Georgia – 1753m) and the deepest cave in Europe.
View Gouffre Mirolda – the deepest cave in Europe (1733m) in a larger map
Three Related European Caves Worth Exploring
While Gouffre Mirolda itself is for experts only, Europe is blessed with spectacular caves you CAN visit:
- Škocjan Caves, Slovenia: A UNESCO World Heritage site with a roaring underground river canyon so vast it has to be seen to be believed. Read more →
- Postojna Cave, Slovenia: Europe’s most-visited show cave, complete with an underground train ride through 5km of illuminated chambers.
- Grotte de Choranche, France: Located in the Vercors massif, famous for its soda-straw stalactites — thousands of needle-fine formations dripping from the ceiling.
Are you fascinated by caves and underground adventures? Share your favourite cave experiences across Europe in the comments below — I’m always looking for new subterranean wonders to explore! 🦇
Love natural wonders? Explore more European caves and natural destinations in Europe.
