Some people redraw Escher's artworks with computer, the others create woodcarvings based on Escher's lithographs, but Ingrid Siliakus crates Escher's buildings using paper. I don't know how this kind of art can be called. I think it's a branch of origami.
UPDATE (thanks to lispnik):
This kind of art is called kirigami that is variation of origami, where the artist is allowed to make small cuts in the paper.
Below you can see some Escher-like kirigami works with respective originals.
Convex and concave
These images are close to originals by M.C. Escher. More such style origami constructions can be seen here http://haha.nu/amazing/unique-paper-cut-artworks/