A crop circle is a large circular pattern created by the flattening of a crop such as rice, wheat, or barley. Although some crop circles are artificially created, other origins are unknown. Thousands of crop circles have been reported in numerous countries since the 1970s.

A 70-meter-wide (70-yard-wide) crop circle that appeared in a rice field in Sleman, Yogyakarta, Indonesia on Jan. 24, 2011.