Discover the Château de Pierrefonds, which doubled for Camelot in the BBC’s Merlin. Dating from the 12th century but rebuilt in the medieval style for Napoléon III by Viollet-le-Duc, don't miss the eerie sound-and-light display in the dungeons with their antique royal statues. From Pierrefonds it’s a 16km drive north through Compiègne Forest to the Clairière de l’Armistice, a tranquil glade where the World War I peace treaty was signed, now home to the Musée de l’Armistice.
Refuel at the Auberge du Pont in Rethondes 7km south-east, with gourmet dining on a terrace by a lily-covered pond in summer. Or drive 7km west to Compiègne, where the Bistrot du Terroir delights with its rustic-chic decor and classic cuisine.
Explore the Palais de Compiègne, where a tour of the royal apartments includes Empress Marie Louise's chamber with its view along the Percée des Beaux-Monts avenue, created for her by Napoleon I. The château also houses early automobiles museum, parkland with rose garden with a tea-room and lovely terrace.
Heading 9km south-east, you come to Vieux Moulin, home to a church designed by Viollet-le-Duc for Empress Eugénie. Another 7km south lies equally charming Saint-Jean-aux-Bois with its ancient abbey and winding streets, bedecked by flowers in summer. Both villages are ideal starting points for roaming the 14,500-hectare Forêt de Compiègne – the third-largest national forest, with plenty of walking/cycling paths.
South of the forest runs the Vallée de l’Automne riverside route including 35 medieval churches and other historic architecture. At Morienval 9km south of St-Jean-aux-Bois, visit the Benedictine abbey with its rose garden featuring more than 200 varieties by David Austin. Other must-sees are the Château d'Orrouy 17km west of Morienval, and the Gallo-Roman ruins at Champlieu a further 6km to the north.
En route back to Chantilly, stop off at Abbaye du Moncel Pontpoint 20km from Champlieu, and the Prieuré St Christophe in Fleurines 7km from Moncel. From here it’s 24km to Chantilly, where the Château de Montvillargenne with its spa, gourmet restaurant and extensive grounds is a haven of relaxation.
Enjoy your road trip to discover French chateaux and pictoresque villages.