I've been documenting Burning Man for the past nine years. It is without doubt one of the world's hippest and most mind-blowing gatherings. The event is a week-long celebration of free-form creativity and radical self- expression held each summer in Nevada's Black Rock Desert. Burning Man is hard to describe. It's not quite an art festival, not quite a desert rave, and not quite a social experiment — but something of all three. But why bother trying to describe it when the photos speak for themselves?