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Cafe Wall Illusion
Category: Shape and Color | Added: November 7, 2009 | 6 comments
This cafe found in Bristol at the bottom of St Michael's Hill features an elaborate wall design. The black and white pattern uses straight horizontal lines however to the observer the lines appear to the bent.

Cafe Wall Illusion
Image Credit: Wikipedia, CC 3.0

Salvador Dali Illusion
Category: Double Meanings | Added: October 31, 2009 | 16 comments
Here's a spooky illusion just in time for Halloween. What do you see in this picture, a profile of Salvafor Dali or a ghostly woman ?

Salvador Dali Illusion
Image Credit: This image is believed to be in the public domain.

Impossible Trident Illusion
Category: Impossible Objects | Added: October 24, 2009 | 15 comments
This well used optical illusion also sometimes referred to as a "blivet" is an impossible shape consisting of three prongs but with only two connecting segments.

Impossible Trident Illusion
Image Credit: This image is believed to be in the public domain.

Birds Illusion
Category: Shape and Color | Added: October 20, 2009 | 21 comments
This repeating pattern of an orthinological variety contains a number of birds - but exactly how many of each colour are there ?

Birds Illusion
Image Credit: This image is believed to be in the public domain.

Cultural Optical Illusion
Category: Double Meanings | Added: October 12, 2009 | 9 comments
This sketch is interesting because what it shows can vary depending on the cultural background of the observer. To those in the west who are used to being indoors this picture can appear to show a family sitting in the corner of a room with a window through which vegetation can be seen outside. Show the same image to someone in Africa however and the perception changes, the rectangular room corner looks like a tree and the window appears as an object being balanced on the woman's head.

Cultural Optical Illusion
Image Credit: This image is believed to be in the public domain.

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