Italy: Violent football
Every year in June Florence's Piazza Santa Croce becomes a battleground. Calcio storico, or historic football, means getting the ball in the goal by any means: kicks to the head are prohibited but head-butting, punching and choking are all allowed. Unsurprisingly, players often get injured. The match lasts 50 minutes, and the players dress in traditional 16th century outfits.