I came across these beautiful photos this morning, by a new (to me!) origami folder on Flickr, luloto1eso.
They are made up of modular units, but they are really beautiful tessellations- some of which would be impossible to fold from a single sheet of paper. I encourage you to check them out, as well as the many impressive modular origami items on their photostream.
These are all really worth looking at in their full size- it won’t disappoint you, I promise!