We’re all familiar with man-made optical illusions, but did you know that nature can actually produce optical illusions as well? For example, have you ever witnessed something that seemed a little bit off in nature?
Maybe something moving that shouldn’t be moving? Maybe a natural phenomenon resembling something completely out of place. From clouds and halos to auroras and mirages, these are 25 Optical Illusions And Phenomena Only Seen In Nature!

Horsetail Falls
Sun Dogs
Also known as phantom suns, this happens when ice crystals in the atmosphere create the effect of having two extra suns on either side of the real sun.
Fata Morgana
A complex type of mirage, Fata Morganas are cause by air of different temperatures distorting light waves.
Light Pillar
Once again, ice crystals are responsible for the vertical beam you sometimes see over light sources in the sky.
Brocken Spectre
Atlantic Road
Moon Illusion
Have you ever noticed that when the moon is close to the horizon it appears to be humongous? Well next time that happens, make binoculars with your hands and isolate the moon in your field of vision. It shrinks!
Why is that? Because your brain adjusts the moon‘s size in relation to another object on the horizon and (mistakenly) decides that it should actually be much bigger!
Cloud shadows
Looking like islands on an ocean, cloud shadows can make for an interesting effect, especially in low lighting conditions.
Atlas Moth
The Atlas Moth comes with two snakes on its wings for protection!
Dew on spider web
Green Flash
Sometimes occurring right before or after sunset, a green spot will appear right above the rim of the sun for a few seconds. Although they are caused by a variety of factors, the general explanation is that light is being bent in the atmosphere.
Circumzenithal Arc
Halo
Alpen Glow
An interesting phenomenon, this happens when the sun has already set but due to light reflecting off of particles in the atmosphere mountains can sometimes appear to be illuminated with a reddish glow.
Crepuscular rays
Aurora Light
In the northern hemisphere, it is known as the Aurora Borealis while in the southern hemisphere it is called Aurora Australis. These phenomena are caused by magnetic rays and solar wind interacting with the upper atmosphere.
Anticrepuscular rays
Gonepteryx rhamni
This butterfly has some incredibly realistic camouflage.
Magnetic Hill
Salt Flats
The Wave
Apache Head
The Apache Head in the rocks is a famous site at Ebihens, France. It is known as pareidolia, or a stimulus which we perceive to be significant but really isn’t.
Badlands Guardian
Found in Alberta, Canada and seen from Google Earth, this rock formation bears the appearance of a human head wearing an Aboriginal Canadian headdress. Thanks to several humans structures the Guardian seems to be wearing headphones/earrings.