A bearded man wearing a beret squints as he looks off into the distance.  He cannot seem to find his dog.  Can you help him find his pet?

By rotating the image 180 degrees and viewing it upside down, the man’s dog (nibbling on a bone) is located.

This topsy-turvy figure was drawn by Russian cartoonist Valentine Dubinin.  To view more of his works, visit his website at ValDub.ru.

“Pool”, by David Macdonald, features a man in the center of the image who appears to be climbing down a ladder.  (I suppose he could be climbing up, but since he is looking down, that is probably the direction that he is headed.  Either way, the illusion is the same!)  The top and the bottom of the ladder are connected to two sections of patio that surround the pool.  This leads to the obvious question – how exactly can be be climbing down (or up) the ladder?

This was the first illusion that David Macdonald created.  It was inspired by the impossible window drawings of Oscar Reutersvärd.

Female dancers in white gowns appear to seamlessly emerge from the crashing water of  a moonlit waterfall.  Much like many of Canadian artist Rob Gonsalves‘ paintings, this image almost has a dream-like feeling to it.

To order prints of Rob Gonsalves’ work, please visit Huckleberry Fine Art.

The two images below present one two-headed arrow that looks to be orange in color and another that appears to be red.  In reality, the two are exactly the same color (red).

The only difference between the two is the color of the border that surrounds the red squares.  The light yellow border used in the top figure gives the red square the appearance of being orange.  Image by Brad Honeycutt, the co-author of The Art of the Illusion.

The Ouchi illusion is named after Japanese artist Hajime Ouchi.  The central disk with vertical black and white bars appears to float above the background with the horizontal black and white bars.

This version of the Ouchi illusion was drawn by Japanese profressor Akiyoshi Kitaoka for Visiome in 2005.

The left and right side of this ambigram designed by Punya Mishra are mirror images of each other.  While the design itself is very simple, it is a remarkable example of a mirror ambigram.

When asked about the design, Punya Mishra offered the following:

“I like the manner in which the same shape is read as an “I” in one context and as an “L” in another and how a little extension is ignored in the case of the letter “D” but means so much when reflected (making it an “a”).

Look at the black dot in the center of this image and move your head closer to your screen and then back again.  Do the outer circles appear to be moving?

This illusion, known as the Pinna illusion, was the first visual illusion to show a rotating motion effect.  It was discovered by Dr. Baingio Pinna.