What are the options for Loire Valley castle tours from Paris?

There are several options for Loire Valley castle tours from Paris, including guided day trips by bus or train, private tours with a personal guide, and self-guided tours by car. These tours typically include visits to famous castles such as Chteau de Chambord, Chteau de Chenonceau, and Chteau de Villandry, as well as wine tastings and lunch at local restaurants. Prices and itineraries vary, so it's important to research and book in advance.