The Tuffeau stone that makes up the bulk of the Loire Valley has been used for building for millennia, and this has left behind a lot of caves. It has also left us lots of lovely buildings too - most of the Chateaux in the area are made of the off-white Tuffeau stone!
Today, it's very easy to find places growing mushrooms in the caves (apparently the Loire is the largest supplier of mushrooms to Paris!), and many places offer tours around them. Equally there are a very large number of houses in the caves, again with many places offering tours and visits. Another popular use is for Saumur Brut, the sparkling wine, which is in many places around Saumur made and aged in the caves, and here too you can often visit.
For all of these popular three reasons for visiting the caves, any guide book or tourist information office will be able to supply you with places to visit, so we've no need of a question for that! However, the caves and the stone have wonderful artistic potential too, and yet looking through a guidebook you won't see anything about caves to visit for this. So, are there any caves that are "arty" that can be visited?