A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site ILLUSIONS AND IMPOSSIBLE FIGURES    • ambiguous figure    • Ames room    • anamorphosis    • antigravity houses and hills    • Benham's disk    • distortion illusion    • Fraser spiral    • Freemish crate    • Get Off the Earth    • Hermann grid illusion    • Herring illusion    • impossible figure    • impossible tribar    • impossible trident    • irradiation illusion    • lateral inhibition illusion    • Moiré pattern    • Müller-Lyer illusion    • Necker cube    • optical illusion    • Orbison's illusion    • Penrose stairway    • Penrose triangle    • Pogendorff illusion    • Schröder's reversible staircase    • scintillating grid illusion    • Thiery figure    • Titchener illusion    • tribar illusion    • upside-down picture    • Wundt illusion    • Zöllner illusion Related category    • GAMES AND PUZZLES Related supercategory    • MATHEMATICS Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP