In reply to Mr Aboulderer:
The nearby village of Moret-sur-Loing is a gem. It was where the English Impressionist, Alfred Sisley, lived, and you can do a bike trail along the river and discover the scenes he painted.
You can also cycle from there along the river to Nemours and have a fantastic cheap lunch at the workers restaurant, L'Ecluse, on the edge of town.
Also there is a good museum devoted to the pre-impressionist Barbizon School in Barbizon. There are two chateaux, Vaux-le-Vicomte, Maincy, and of course Fontainebleau.