Weve highlighted some of the unique tiles of Renata Rubim in the past but this time were taking it outside with these cement paving tiles called Ellos. The asymmetrical design creates different patterns depending on how theyre laid, thanks to their curvy sides being carved out. Made from durable refractory concrete, the tiles will hold up under the elements and the weight of humans walking on them. The open, swiss cheese-like holes allow for grass to grow in between, helping to catch and soak up the rain water. You can also fill the holes with stones.