Here are some ideas of the most interesting tourist sites and their internet address in the area.

The city of Combourg, cradle of the romamntism litterature and its castle, where Chateaubriand used to leave. www.combourg.com
The city of Saint-Malo and its ramparts from where the corsairs could attack english and dutch ships during the wars. www.ville-saint-malo.fr
The city of Cancale, its oysters ans its harbour. www.ville-cancale.fr
The area of Dol and the Mont-Saint-Michel. www.pays-de-dol.com