Leo and I recently completed a bathroom remodel. Our upstairs bathroom didn’t have a tub/shower when we bought the house last summer, but it does now! We decided to put in a Penrose tile pattern floor. You can’t buy that commercially; the pattern, although it has a lot of symmetry, does not have a single unit that you can just repeat over and over again like you can with square tiles. I bought big pieces of tile and cut them down into the necessary shapes. We put the whole thing together, but our awesome tile guys installed it and made it look awesome. I like this picuture of it, as you can see a lot of the symmetry.