California artist Jim Denevan has yet to sell a single piece of artwork, instead he uses the California coastline as his canvas, creating sweeping ephemeral works on the sand. The artist completes his stunning works, such as a giant spiral by the early afternoon, only to watch it be washed away by evening. The following short video shows the artist at work:

http://jimdenevan.com/

Jim Denevan is also the founder and organizer of Outstanding in the Field, a very cool worldwide moveable feast who's mission is to re-connect people to the land, and to where their food is grown, and to honor the local farmers and food artisans who cultivate it.

http://outstandinginthefield.com/

In March 2010, he created the world's largest artwork based on the Fibonacci sequence, on the largest lake in the world, Lake Baikal.

Jim Denevan: Lake Baikal