Sete is a beautiful town in the Occitania region of France. Sometimes called the Venice of Languedoc, it is a popular Mediterranean resort. You can hike up the Mont St-Clair for a beautiful view of the town, visiting Notre-Dame-de-la-Salette church on the way. Then visit Musee Paul Valery, with a great permanent collection of art, as well as very interesting exhibits.
Castellon is a region in eastern Spain, with the capital in Castellón de la Plana. Situated on the Mediterranean coast, it offers beautiful beaches, and historical locations. The region is bi-lingual, with both Spanish and Valencian being used as official languages, making for an interesting meeting of cultures.