This is an example of positive and negative from Gestalts theory. The black part of the image shows a man playing a saxophone and the white part shows a beautiful woman. http://unit4ctaad.blogspot.com/2013/02/positive-and-negative-space.html
Edgar Rubin, a Danish Gestalt psychologist conducted research on figure ground illusions. In this image, your brain chooses to see either the vase or the face of a bear. Both cannot be seen simultaneously.
Chicago architect and designer Jerome Daksiewicz of Nomo Design has just released a new series of screenprints that illustrate the various configurations of major world airports. Right now he currently has editions for Chicago, San Francisco, Los Angeles International, and Minneapolis St-Paul, but will soon be adding an additional five cities. cc/ @Sha Hwang @straup