Very nice link, thanks. On Driving the Stone Age II: Peret, we visited the Cave of Niaux. Long day trip from Peret, but well worth it.
On DtSA VII: Lot & Paris, we visited Perch Merle, Grotte de Cougnac and Lascaux II. (For caves.) We had a reservation to visit Font de Gaume, but a medical emergency prevented us from making it. Just another reason to return to the south of France! Although Quercy isn't the Languedoc, or vice versa.