Visit an artist's studio in a castle, discover chapels within the trunk of a medieval oak tree, pour Calvados on a grave in the village of Camembert, pay your respects at the site of scores of apparitions of the Virgin Mary, decipher the alchemical decorations at Hôtel d'Escoville in Caen, examine a historic pool for washing horses, seek the work of a Freemason architect in Rouen cathedral ...