The Pirate Ship and the Church Trap.
The art car (on the left) is called The Pirate Ship, aka The Clock Ship Tere, by Andy Tibbetts.
For more info about this art car, go to www.facebook.com/ClockShip.
On the right, the Church Trap, by Rebekah Waites and crew.
For more info about this art installation, go to www.churchtrap.com.
Photo taken at the Burning Man 2013 festival (Black Rock Desert, Nevada).