In the early hours of the morning, 600 participants set off to (re)discover a city. Guided throughout the day by a roadbook packed with riddles, they must complete as many challenges as possible before crossing the finish line. These challenges allow them to discover the different facets of the city, while experiencing a different kind of tourism, based on authentic encounters. The aim is to be an actor rather than a spectator: to solve riddles, share unforgettable moments with friends or family, and step out of your comfort zone while gaining access to unusual challenges.