Japanese artist Sagaki Keita creates pen and ink illustrations that are themselves composed of tiny figures inside, from people to anthropomorphic ice cream cones. The level of detail that he provides is really astounding. You can see several other examples at the link.
Link via Dude Craft | Artist's Website
Like that? Gregg Visintainer in San Diego, CA taught himself a similar style. Google him (VIs Art) nice guy, lovely stuff.
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Paint by number, for the old masters.
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