676 Ways of Looking at the Alphabet, by Dan Waber
What each letter of the alphabet looks like when viewed through each other letter. I considered making this interactive so that you could select base letter and mask letter, and also choose from 8 directions of movement, or even manually completely control the way the flythrough happens, and/or choose different fonts. I ended up deciding all of that control would steal away from the wonder rather than enhance it. If somebody really wants a version with controls of some kind just let me know, it's easy enough to build.
Source code: glypher