At least a few days from such a long journey will need to be allocated to Paris. Walk around the city, admire the cathedrals, take a picture near the Eiffel Tower, visit the Louvre, palaces and parks of Versailles, Fontainebleau. If traveling with children, do not miss Paris Disneyland

Then from there you can move to Rouen (there to see the Old Town Museum), Le Havre (its center is a UNESCO World Heritage Site), where to go to Mont Saint-Michel. This is a majestic island fortress in the Channel Bay

After visiting the island, through St. Malo and Rennes (there is a good Botanical Garden) to move to Blois and then to Tours. From these cities it will be convenient to travel along the castles of the Loire: Beaujansi, Chambord, Blois, Clos-Luce, Amboise, Chenonceau, etc.

Then you can go to Poitiers, Limoges or Bordeaux, after visiting several castles in the valley of the Dordogne (Biron, Montaigne, Montfort). Having moved to the beauty of Toulouse, you will have to stay to see all its sights. Then the road leads to the fortress of Carcassonne and further, through the University of Montpellier, Nimes and the port Marseilles to Cannes and Nice, where in the season you can sunbathe and soak up on the beach.