The Grotte Chevalier is 800 metres long, 40 metres wide and as wide under the ceiling. Littered with boulders, it is easy to walk through to its end, 160 metres below the entrance. The Grotte Chevalier is a major underground walk, where you can progress without the need for ropes, in the interior and silent immensity of the mountain. It’s sure to delight all those who want to discover the underground world, including children aged 10 and over, for whom this day’s adventure will be unforgettable.