I have been to France a few times visiting mainly Lyon and Paris. I would love to visit more places in the future.
Paris is considered one of the most beautiful cities in the world! I've been to Paris twice and I really like the city (although the traffic is very heavy and there are tourists everywhere). Places to visit in Paris:
You can visit almost all the sights by walking (except Montmartre and Sacré-Coeur), but be prepared to walk a lot! I think I never walked as much in my life as on the days we were in Paris.
Lyon is one of my favorite cities in France. It's located in the region Rhône-Alpes and it's amazing in summer! Lyon has two rivers and in summer you can have a picnic or chill at the rivers at night. There is also a beautiful parc (Parc de la tête d`Or). The city organizes every year the event: “Tout le monde dehors” (everybody outside) with over 300 free activities. These include concerts, dance evenings, cinema evenings, readings, sports activities, etc. And the best thing is: everything takes place outside! You can spend between 3-5 days in Lyon (especially in summer) and just enjoy the atmosphere :)
Place to visit in Lyon :
Reims is a very nice city located and the Lorraine region. It's famous for its cathedral, where the French kings were crowned for centuries. The cathedral is also part of the UNESCO world heritage since 1991.
Nancy is also an amazing city located in the region of Lorraine. You can spend one or two days here and visit famous sites like the neo-gothic Basilique Saint-Epvre, Stanislas place, and the Palais des Ducs de Lorraine. There are also some art museums (Musée de l'Ecole de Nancy, Musée Lorain, Musée des Beaux Arts etc.).