Unusual ground marking

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Unusual ground markings or UGMs are ground features that appear to be hard to explain. The best-known UGMs are crop circles.

Other forms of UGM are ice circles, footprints of unknown origin and burnt grass. At some Unusual Ground Markings there is said to be a higher level of radioactivity than the background of the surroundings.^{[citation needed]}

Unusual ground markings are sometimes interpreted as landing traces of UFOs or as footprints from cryptozoological animals or extraterrestrial aliens, while for skeptics most of them are fakes.^{[citation needed]}

[edit] See also

Notable unusual ground markings

• The devil's footprints in Devon, UK in the middle of the 19th century
• The cross in the grass at Eisenberg an der Raab
• The faces of Bélmez
• Crop circles
• Close encounters of the 2nd kind (CE-2), in which a UFO leaves ground traces, even radioactivity.
• Nazca Lines, The Nazca lines are a series of geoglyphs located in the Nazca Desert.