Messages are left by participants at the Temple of Whollyness during the Burning Man 2013 arts and music festival in the Black Rock Desert of Nevada

Messages are left by participants at the Temple of Whollyness. (Jim Urquhart/Reuters)

The sun sets over the “Cradle of Mir” art installation at the 2013 Burning Man arts and music festival in the Black Rock desert of Nevada

A fire tornado emerges from the burning embers of the Temple of Whollyness as it burns at the conclusion of the 2013 Burning Man arts and music festival in the Black Rock desert of Nevada