Years ago i made a graphic story for the small daughter of a friend that did this kind of thing. It started with a graphic of her cat sitting on the doorstep of her house, and if you zoomed into one of the cat's eyes, there was a map of the world, and eventually you zoomed into the city, then the suburb, then the house, and there was her cat sitting on the doorstep....

And if you zoomed into the other eye...

I did this in generic cadd6, but it struggled with the zoom resolution; I always meant to try it with autocad, which I believe "resets" the zoom, so in fact the zoom level is limitless...?

cheers
rabbit