At that time , tourist visits of the caves were performed by entering through the natural entrance and the low passage of the “estrangladou” that led to the “ Salle des Vasques”. back then the visits were made with torches, and the guides lit bengal lights and sold them in exchange of a few coins. Even if the chambers ware so vast, the smoke would spread very rapidly and the group of visitors had to rapidly find their way out of the cave.
For the French national day (14 July), the visits to the cave were part of the festivities.
In 1945 began the era of new discoveries, thanks to the perseverance of M.G Vaucher and his sons Marc and Olivier. Through their work, more than 7 kilometers of network were explored.