2: Two Wise Men and a Dangerous Cheese in the Jura. Arthur Smith heads for the beautiful national park of the Jura where, tucked away on the border with Switzerland, lie the former homes of two of France's most revered philosophers - Voltaire and Rousseau. In the company of another Parisian philosopher in exile, Muriel Zagha , Arth urwalks through the beautiful pare national of the Jura. Producer Sara Jane Hall