Not something on the nose fairy tale like, so no the Glass Slipper or the Giant Beanstalk. Especially since there is no giant beanstalk in this world.
Not something routine like The Blue Bull or The Goose and the Swan or The Three Crowns.
Three Mermaids -- nah, not so far from the sea.
Possibly The Four Winds. The inn-keeper is listening to every tale, because she is secretly trying to find her husband despite a witch's curse, and thinks this more effective than random wanderings.