German Witches in May

Walpurgis Night: Witches have supposedly been gathering in Germany's Harz since the mid-17th century to light fires and "hold revels with the devil." The event on April 30 still attracts thousands of visitors, and is spread across 20 locations around the Brocken Mountain. The focal point is Hexentanzplatz (Witches' Dance-floor) in the Harz Mountains. (more here.)