My notes from when I tried to visit in 2005.
To the north of Bournand, but in a very vaguely marked place on my map, is marked the Pierre Folle allée couverte. In the village of Bournand, there is a sign pointing to the Pierre Folle, but as is often the case, I found no more signs later, and try as I might, without a detailed map I could not find this.
After my failed visit, I found out that it is an 18 metre long allée couvert, on inaccessible private land within a Renaissance Lodge. It is said to be a superb megalithic monument.
Something is not right. This message is just to keep things from messing up down the road