Explore Celle's old town — Europe's largest closed ensemble of half-timbered houses — at your own pace with a self-guided audio tour on your smartphone. No app needed, no physical guide, no fixed groups or schedules: just follow the map through 9 stops, from the moated Celle Castle to the carved gables of Hoppener Haus and the Altes Rathaus, listening to the stories behind each one. Along the way, solve interactive quizzes and riddles that turn local history into a game. Start anytime, pause whenever you like, and explore freely.