Watch this beautiful time-lapse video created by Roy Two Thousand of 2013's Burning Man event.
Burning Man is a week-long annual event held in the Black Rock Desert in northern Nevada, in the United States. The event begins on the last Monday in August, and ends on the first Monday in September, which coincides with the American Labor Day holiday. - wikipedia
Those who are more interested can check out the book Burning Man: Art on Fire that was just released this month by Race Point Publishing.