The Forest of Fontainebleau is huge in area (for a Central European forest) and nice to visit. The various sandstone formations scattered around, in particular the Place du Cuvier, form the birthplace of the sport of bouldering, and the landscape inspired the so-called Barbizon school of painters, who gathered in the village of the same name on the edge of the forest. However, I do not fully understand why the area should receive another WHS status. A large fraction is already protected under the WHS "Ancient and Primeval Beech Forests of the Carpathians and Other Regions of Europe", including the areas around the Ermitage de Franchard, Les Gorges d’Apremont [visit/hike recommended] and Place du Cuvier. Barbizon (village) itself is nice but not unique enough in my humble opinion but that said, it does not seem to be within the nominated area anyway, which is called "Domaine de Fontainebleau: château, jardins, parc et forêt". Finally, the impressive Palace of Fontainebleau and its surrounding parks and gardens are a WHS since 1981. Thus, everything from "château" to "forêt" is already WH-protected, and I do not see the need for duplications.