Chantilly - I've said it before and I'll say it again, You haven't seen France if you have not visited Chantilly

Forget Versailles, the real jewel in France is the Castle/chateaux at Chantilly ( just 30 minutes north of Paris)
Besides a 'knock-your-socks off' chateaux, it houses the greatest collection of art in France outside of the Louvre.
So what are you waiting for?