3 Extra Days in France

For red wine and food markets, you can't go wrong with Provence. Take the train from Paris to Avignon and rent a car. There are markets every day of the week in the towns and villages and lots of Cote du Rhone wine.

Burgundy has a friendly and accessible wine scene that is world class. It is largely rural and would provide a pleasant contrast to Paris and London. There are some chateaux, abbeys, and world-heritage sites. Great cuisine too.

Beaune makes a great base and you can rent bicycles there; the proprietors of the shop can suggest appropriate itineraries. It's about 2 hours from Paris by rail. I think for four days you'd probably want a car, which you could rent there.

Provence is another exceptional destination, also very different from Paris, and its wines, though not in the same league as Burgundy's, are interesting and fun. I think you'd also want a car there too, though there is more to see by rail than in Burgundy.

One logistical advantage of Provence, even though it is a bit farther, is that there is an airport in Marseilles and you might be able to arrange to fly home from there, or from Lyon, rather than returning to Paris. There are also a few direct trains from Avignon to Charles DeGaulle.