In a cave at the heart of nature, set off on a journey to a world from the depths of time! A little train takes you to the entrance of the underground world. Your visit runs through a strange setting, shaped by water for thousands of years. You begin where once a river went underground and follow to the old resurgence point, where prehistoric people took shelter almost 10,000 years ago. From here, in the middle of a cliff, you can look down on all the Cerdon valley and enjoy a unique view over the vineyards. This strange and fascinating visit ends when you pass under a majestic archway, then along a forest path.