Pareidolia is the tendency for perception to impose a meaningful interpretation on a nebulous stimulus, usually visual, so that one detects an object, pattern, or meaning where there is none. Pareidolia is a type of apophenia.
The Danish electrical outlet purportedly resembles a happy face.
The Jurist by Giuseppe Arcimboldo, 1566. What appears to be his face is a collection of fish and poultry, while his body is a collection of books dressed in a coat.
Salem by Sydney Curnow Vosper (1908), a painting notorious for the belief that the face of the devil was hidden in the main character's shawl
Illusory woman in the Niğde Alaaddin Mosque portal
In meteorology, a cloud is an aerosol consisting of a visible mass of miniature liquid droplets, frozen crystals, or other particles suspended in the atmosphere of a planetary body or similar space. Water or various other chemicals may compose the droplets and crystals. On Earth, clouds are formed as a result of saturation of the air when it is cooled to its dew point, or when it gains sufficient moisture from an adjacent source to raise the dew point to the ambient temperature.
Cloudscape over Borneo, taken by the International Space Station
Windy evening twilight enhanced by the Sun's angle, can visually mimic a tornado resulting from orographic lift
Cirrus fibratus clouds in March
High cirrus upper-left merging into cirrostratus right and some cirrocumulus far right