Fulda becomes an interactive treasure hunt. Most visitors stop for the cathedral and move on — this walk gives you the whole baroque town, at your own pace. Follow a route from the prince-abbots' City Palace past the Boniface monument and down to the river meadows, then back up to the medieval Witch Tower, the cathedral square and the palace gardens, ending at the Old Town Hall where the medieval town once had its heart, and at every one of the 12 stops answer a quiz question you find in the surroundings — the clue is around you, not on a screen. Sightseeing, a continuous storey and a light brain-teaser rolled into one, played at your own pace on your phone: in the browser with no account needed, or in the CityWalkGems app. No live guide: just open the link and start exploring. Perfect for a stopover between two ICE trains, or before the Christmas market on the Universitätsplatz.