Regular structures

There are regular impossible structures. These structures which posess self-recurrence and self-likeness resemples to tesselation images which Escher did.

Impossible structures by holland artist and sculptor Rinus Roelofs
He says that they are not tesselations but joints. These images were created for Escher Centennial Congress in  Rome in 1998
Impossible architectural regular structures by Jos Leys
Impossible structures with distortion by Jos Leys
Impossible endless castle by Robert Shuttleworth