Two aerial shots of this crop formation at Honeystreet near Alton Barnes show it incomplete and then complete. It’s unusual but not unknown for formations to be added to, but very unusual for one to be seen clearly unfinished, then later finished. The formation is also very challenging, and unlike those known to be created by human circle makers. The complexity of the design and the subtle crafting suggest that this may be of unknown origin.

Story Source:
http://www.cropcircleconnector.com/2011/honeystreet2/honeystreet2011b.html