Chateau Adventure, a.k.a. Eco Chateau or Chateau de Cautine is set just at the edge of the Dordogne region of France, near the medieval town of Argentat. I am going at the end of April and will report back! According to the site, it is "full of original antiques, cosy furnishings, sleigh beds & huge open fireplaces. It has a 15-metre salt-water pool, 34 acres of fields & woods and its own stream. They organize adventure holidays and are also beginning an eco holiday and co-housing project.