Pictures from the legendary festival held annually in Black Rock Desert, Nevada

Since 1986, revellers have been flocking every year to Burning Man, America's most out-there festival. Ostensibly a music and arts festival, it's a free-spirited free-for-all for those who find everyday society's constrictions a little binding. Over 60,000 festival-goers from around the world have turned out for this year's event, the theme of which is 'Fertility 2.0'.  Click through to see the 20 craziest pictures from Burning Man 2012.