Hypnotic site for active minds and puzzle enthusiasts: enjoy making and solving intriguing puzzles, discovering new optical illusions and more.
A web part of a puzzle-book-web project entitled Age of Puzzles. The project makes a comprehensive mosaic of puzzles created by different people in different time and at different places.
A free collection of over 400 riddles, 400 games, 50 illusions, the famous gry riddle, picture puzzles, quizzes, logic puzzles, math puzzles, jumble puzzles, mystery puzzles, brain teasers, word puzzles, vocal puzzles, funny comics, funny cat pictures, trivia, and many more activities to keep you busy for hours.
Algebra, geometry, matchstick and logic puzzles, paradoxes, optical illusions, IQ tests and logic games.
Home of the Paradoxical. Featuring puzzles, games, illusions, ideas, riddles, quotations, books, poems and more, all on a paradoxical theme.
Kevin Stone's unique collection of brain teasers, games and optical illusions. With over 1,200 teasers, 102 awards and around 1,400,000 Visitors per year, this site claims to be the world's most popular brain teaser resource.
From Tricky and Clever Puzzles through Baffling and Perplexing Illusions to Cognitive Toys.