Amiens is really nice – network of canals https://www.visit-somme.com/amiens-and-other-tales/hortillonnages-maze-floating-gardens and a very impressive cathedral. Lots of restaurants and bars. Don’t think I’d stay more than 48hrs though.
Agreed, except for the 48hrs bit. We stayed about 40 miles away at St Valery sur Somme, for a week. Plenty to do, in a very relaxed way. Off the top of my head, we visited Amiens itself and the zoo, Albert, some of the Somme battlefield, Nausicaa at Boulogne. I rode to the medieval battlefield at Crecy and around the coast a bit in the evenings. One rainy Sunday we just opted for the short trip into St Valery and spent a lot of the afternoon eating huge bowls of Moules Frites. It was a nice week, we were talking about spending a long weekend there a few days ago, in fact.
Apply for the French ulez.
It's cheap but worth getting just to avoid otherwise unavoidable diversions and lasts for the lifetime of the car
St Malo area for a week if weather is nice. Just west Dinard is lovely. Just east cancale and mt st michel are interesting. Good beaches etc in and around st Malo. Easy access to condor and Brittany ferries (not cheap though) plenty to do in around st Malo.
further south on the west coast we liked ile de re which is a great place to go if you take your bike as there are cycle routes/ lanes everywhere and nice towns, villages and beaches.
