Negative Space Logos

http://naldzgraphics.net/inspirations/creative-logo-design-30-negative-space-logos/

Dali - Disappearing Bust of Voltaire

Palindromes

MadamImAdam

"A man, a plan, a canal, Panama"

or using words:

"Fall leaves after leaves fall"

Escher's birds and fish

Visualizing Postive and Negative Space

http://www.artsconnected.org/toolkit/watch_space_positive.cfm

Double click on the link above for a demo of positive and negative space.