Make sure you have plenty of gas in the tank, because Nantes is worth making a detour for. Located 40 miles from Langon, it has some terrific attractions, such as Chateau of the Dukes of Brittany and Nantes Cathedral. Vannes, 40 miles away, is another road-trip destination that’s worth the journey. Stop by Le Chorus Exhibition Centre and Musee de La Cohue, two popular attractions in the area.