The Sculpture, seen here on Treasure Island in San Francisco Bay, is called "Bliss Dance". It was created by Marco Cochrane for Burning Man. The sculpture is 40' tall and it is beautifully made, with an internal structure covered by a wire mesh. The detail is quite beautiful, as are the flowing and graceful lines! Bravo!
As of March 2016, Bliss Dance can now be seen in Las Vegas: