About Ceramic :
This is a very good web-site about technique, and even about lots of things : 
- A specialized bookstore on line and lots of usefull informations : http://www.ceramique.com/
A directory of ceramists and glass-makers, also in English : http://www.ceramique.biz/ceramannu/
An English web-site : http://www.ceramicstoday.com/
About Bonsaï trees :
http://www.passionbonsai.org/
A magazine and a specialized bookstore :
http://www.esprit-bonsai.com/
http://www.edgbonsai-fr.com/
To see and to do near to Castellane :
Sports in the Verdon :
woodturning : http://www.brigittetrier.com