Lenny & Meriel did the artwork in sand & then photographed them from above with a kite. The amazing results can be seen above. You can see a more complete set of pictures here.
This post via http://www.crookedbrains.net/2007/12/art-from-above.html
These 'Sand Arts' are created by Jim Denevan using the twigs or branches which are brought to the shore by the waves, without using any kind of measuring instruments. Jim draws -- working up to 7 hours and walking as many as 30 miles. His work has been featured in the New York Times, National Geographic, Elle, GQ, The Surfers Journal, and Outside, as well as in many other national and international publications.
This post via http://www.crookedbrains.net/2008/12/art_09.html