This was a fantastic site visit for us. It's home to the famous Chauvet Cave, only discovered in 1994 and home to paintings dating back almost 30,000 years. It's amazing to see what proper conservation from the modern era can do (as opposed to conservation efforts on earlier-discovered caves like Lascaux or Altamira in Spain). You can't visit the original cave, naturally, but the replica cave is actually really well done. The guided tour is in French, but non-French speakers can use an audioguide instead which we were fairly happy with. The art in the cave is pretty mind-blowing, with a variety of techniques used to paint mostly predatory animals. I was reminded as well that there's a Werner Herzog documentary featuring the cave, known as "Cave of Forgotten Dreams", so I'd highly recommend checking that out if you'd like more info.