Official site including biographical information, images, copyright information, and more. Also in Dutch.
World of Escher
Includes repeating geometric tilings, spatial illusions, essays, and stories.
Wikipedia: M.C. Escher
Hyperlinked overview of the life, works, and popularity of the artist known for impossible constructions, explorations of infinity, and tessellations.
Escher and the Droste Effect
Project that aims to visualize the mathematical structure behind Escher's Print Gallery and proposes images that could fit into the blurry hole in the middle of it.
Artcyclopedia: M.C. Escher
Links to sites on the web highlighting the work of the Dutch illustrator.
Snakes, The Movie
Animated film based on the woodcuts my artist, M.C. Escher. Includes movies and still images.
Artchive: M.C. Escher
Book excerpts, suggested reading, and 21 artwork images by the master of optical illusions.