Drawing in the Sand Answered
Artist Jim Denevan makes sand drawings--but on a much bigger scale than your average beachcomber. This one is three miles across, a project that required a mind-boggling 100 miles of walking to complete. After one week, though, a rainstorm made the drawing disappear completely.
Link via Geekdad
If you like this, another artist who works in nature is Andy Goldsworthy. Some of his pieces do not last more than a few hours, such as this ice sculpture from :30 to :55 that melted as soon as the sun rose.