The Loire Valley
In the Loire valley are situated the most beautiful castles in france. 
The most famous castles are Angers, Chambord, Chinon, Chenonceau, Villandry and Saumur. You should have a tour of the castles over several days.
In summer many of them house outdoor spectacles of dance, music and fireworks.
The town of Chartres is considered to be the most superb Gothic building in Europe. The United Nations has indicated the Cathedral to be an international cultural heritage sight.
The French Riviera (Cote d'Azur)
The Cote d'Azur or French Riviera lies along the Mediterranean coast at the very foot of the Alps and is one of word's most popular holiday destinations.
It takes less than 2 hours to get from Mediterranean bliss to the cool Alps. Make sure to visit the charming cities of the region. Take a trip to the independent principality of Monaco for some more lustre and glamour, and make sure to dress well; it is an important part of even getting into the country!
Chateau de Versailles
The Chateau at Versailles is one of the most beautiful attractions in France. 
It was built by Lois XIV in forty years and designed to be the court and the capital of France.
Versailles has gigantic proportions and works of art by French artists and craftsmen. This stuff was used by Louis XIV to showcase the power of the French Monarchy.