Paris and Île de France by bike

The reputation of Paris is well established, but do we know enough that the region Île-de-France surrounding it is one of the most pleasant destinations in France to be discovered by bicycle? Île-de-France has a remarkable heritage: royal or imperial castles and palaces, historic villages and towns, wonderful churches and cathedrals... Nature is also very present with immense forests, powerful rivers and other canals which are as many attractive playgrounds for cyclists. And, Paris being Paris, many great itineraries converge there, such as the Avenue Verte London-Paris or the Véloscénie Paris Le mont Saint-Michel à vélo, and soon many others described on this site...