One of the best Markets I have ever been to, is the one in Nice. Provencal Market by the true meaning.
Fantastic fruits and vegs from all over Provence. Amazing sea food straight from the med which is basically 15 meters away. all kind of spices and herbs.
The market is surrounded by nice french bistros and bars where you can sample fantastic dishes freshly prepared. Its a real paradise for any foodie. Definitely worth the detour