Starting at the Marktstätte, Konstanz's old-town market square, you'll open the Explorial app, enter the 6-digit game code that you received by text and Viator chat message, and set off through streets the war never touched. The tour is fully self-guided — no guide, no fixed start time, just your group and the city. The Kaiserbrunnen opens the fun — a fountain crowded with satirical bronzes that tease four emperors and one very smug peacock. Riddles join the mockery. The Haus zum Hohen Hafen follows, the patrician house remembered as the 'cradle of Prussia' for a fateful noble birth within. Trivia checks the family tree. Then Münsterplatz spreads before the cathedral where the Council of Constance ended a papal schism — and condemned Jan Hus. Around two hours between lake and history. The leaderboard elects its own winner — no schism expected.