Equipped with a digital key, visitors have access to several unusual places in the Château and in the old town of Porrentruy, some of which are staged by sound and light animations. As master of the keys, push the door of the secret and unusual places of Porrentruy, in which you will attend marvelous animations. Do you know Pierre Péquignat, the rebellious clerk who defied the Prince Bishop and the tragic end of his struggle? Have you ever seen the Wyvern come to life, a mythical and fantastic animal that feeds on the energy of water? Do you think dinosaurs still haunt the town of Porrentruy? The Secret Circuit will make you live an exclusive unique experience.