Gyroid 1
A gyroid is an infinitely connected triply periodic minimal surface (as defined by wikipedia). They’re also really easy to make and look really cool too. I was inspired to model one after having seen several versions on shapeways. They are simply a repeating minimal surface primitive, stacked on top of each other. This particular version is 16 of those primitives arranged end to end, stacked 2 high, rotated around a central pivot point and stretched to create the undulating flower surface you see above.