Here are some pictures of a remarkable crop circle design, taken at Silbury Hill, Wiltshire:
http://www.dailymail.co.uk/pages/live/articles/news/news.html?in_article_id=465540&in_page_id=1770&ct=5
How impressive is that?
not quite as creative but much more to the point.
Some enterprising farmer cashed in on the fact his fields are on the route into London Gatwick:
http://www.ananova.com/news/story/sm_2375986.html