Similarly, or perhaps oppositely: Luigi Serafini's Codex Seraphinianus. (Which, in fact, I learned about from a Hofstadter column.) This is a compendium of pure nonsense, an encyclopedia in an untranslatable language. The illustrations imply scenes of ordinary life -- plants, animals, insects, technology -- but the elements of the world are melded, rearranged, coagulated. One has the sense that they make sense, but on a level just out of one's grasp.
-- Andrew Plotkin