• Grottes du Cerdon website uses cookies for a better experience : I understand

Visit of the Caves of Cerdon

A nature outing 1 hour from Lyon, Geneva or Annecy

The complete route of an ancient underground river

Plan des Grottes
Plan des Grottes

Visit of the Caves

Discover a strange and exciting underground route shaped during the great ice ages. 

A 1H or 1H30 walk from the burial point of an old river until its resurgence in the middle of a cliff on a belvedere overlooking the Cerdon’s valley and its vineyards.

Choose your visit:

Guided tour at fixed times, independent visit or visit in the form of a tale for the youngest.


Questions about the Caves

Do you have questions about the Caves?
Consult the most frequently asked questions.


Audio guide

Download the Cerdon Caves AudioGuide mobile application and visit the Caves independently thanks to the numbered blue markers placed along the path.


The history of the caves

Prehistoric Men very early chose the cavities of the site as a refuge. Excavations carried out since 1914 have uncovered multitudes of pottery, cut flint, huge heap of ash (4 to 5 m thick), quantities of animal bones as well as a human skull with prominent orbits.

These discoveries indicate that this natural shelter was inhabited since a very remote time (10 to 12,000 years).

Questions sur les Grottes
  • Why a 2-part visit?

      • The main part corresponds to the concreted gallery and the path constitutes a loop with departure and arrival at the reception of the site. For people ready for an additional ascent effort, it is possible, at the end of the upper gallery overlooking the large room, to continue independently to the belvedere. This overlooks the Cerdon’s valley and its vineyards.
      • This second part with a higher elevation and therefore on the initiative of each and own rhythm.
    • Can pregnant women, elderly people go down to the cave ?
      • The entire path through the caves is landscaped, marked and lit, but the elevation, the stairs and the temperature differences represent additional physical effort compared to a simple walk outside. It is up to everyone to judge their ability based on their physical condition, knowing that the first part remains very accessible.

      • The 2nd part of the circuit is the most physical.

    • What is the temperature in the cave ?
      • The upper gallery is at 13/14 °C and then drops to around 10 °C at the end of the large hall. For the second part, the temperature drops to 4 °C for 5 minutes. On the belvedere, you will find the outside temperature.

      • It is the temperature differences and the elevation that make this second part of the visit more physical.