Tucked into the courtyard of Kanonia, just behind Warsaw's Old Town Cathedral, the Wishing Bell is easy to miss and all the more satisfying for it.

Cast in 1646 and finely engraved with images of Jesus, Mary and John the Baptist, the bell was never actually rung. It had flaws from the start, and legend blames a saboteur: a man who tampered with the casting out of rivalry for a woman's affections. That rival died by poisoning; the saboteur threw himself into the Vistula.

Happier folklore holds that placing your hand on top of the bell, making a wish and walking around it three times will make that wish come true.

VoiceMap's tours of the Old Town use the bell to anchor the stories of Kanonia Square, including its former life as a cemetery, its Cold War spy museum and the narrowest house in Europe, hiding just around the corner.