Everyone recognizes M.C. Escher's famously impossible staircases, angles that inspire confusion and wonder. His most famous works have been referenced in pop culture since forever, and now the challenge to recreate these works in three dimensions has origami artists doing incredible things with paper. A rendition of Escher's Relativity is shown above, but Kuriositas has a gallery of others. Link
Image credit: Crackpot Papercraft
I think the above example would be called "kirigami", which is paper cutting as well as folding.
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