I'm thinking about day trips from Paris and have a few in mind. I'm interested in visiting Rouen and Beauvais in one day, OR Rouen for one day, OR Bayeux for one day.
I'd like to go to Rouen to see medieval churches and a Jewish site (a Romanesque building that burned down and is believed to be the oldest Jewish building in France) and to Beauvais only to see the cathedral. It is feasible to visit both towns in a day?
And should I buy train tickets in advance, or do they cost the same on the day of purchase?