In reply to Bob Kemp:
Just remembered, spent half a day bouldering in a really nice area of limestone blocs, near one of the municipal campsites. Just a wilderness of pinnacles dissected from a limestone plateau. No polish and great landings. Exactly where it was, I have no idea now - sorry!
Edit - it may have been here:
https://www.camptocamp.org/waypoints/102112/fr/casteljau-blocs - the pic on the right looks very much like the kind of terrain I remember.
Post edited at 23:18