This is one of the rare caves with natural concretions that you can visit under caving conditions, accompanied by a specialist guide. This meander, the height of which varies between 25m and 1.5m, does not pose any difficulties in terms of making your way along it, or any risk of flooding. It is perfect for teaching. Helmet, headlamp, wetsuit and old shoes on your feet, you walk in the underground river in the company of a passionate caver who talks about speleogenesis (development of the cave), biospeleology (cave fauna) and prehistoric humans.