EntityQ1190645· pop 21· linked from 132 articlesPonzo illusionSign in to savegeometrical-optical illusionConnectionsItalyCountryInternational Standard Book NumberEntitydigital object identifierEntityrail transportEntityillusionEntityQ180686Entityoptical illusionEntityQ229883Entityop artEntitytrompe-l'œilEntityambigramEntityPenrose triangleEntityQ22908627EntityPenrose stairsEntityMoon illusionEntityvisual cortexEntitygravity hillEntityHandle SystemEntityAmes roomEntityvanishing pointEntityCategoriesOptical illusions