Bonfires and masks for everyone's favorite anarchist.
Groups in cities as diverse as New York, Belgrade, and Hong Kong donned those infamous masks on November 5, what's become known as Guy Fawkes Day, or Bonfire Day, a commemoration of the British anarchists's failed attempt to blow up the British Parliament in 1606.
In San Francisco and London, thousands joined the 'Million Mask March' in support of Anonymous, the global hacking group. Others seemingly used the occasion to walk around town in a creepy mask and not feel weird about it.
Check out the photos below for a look at how Guy Fawkes is honored around the world. You'll notice the day is celebrated in England as the foiling of a major terrorist plot. But elsewhere, the mask of Guy Fawkes has become an important symbol of resistance.