Outdoor sculptures are increasingly embracing diatoms, microscopic algae, as a sustainable and innovative material. These tiny organisms, known for their silica-rich shells, offer unique textures and eco-friendly properties. Artists incorporate diatoms into concrete or resin mixtures, creating durable yet lightweight sculptures that withstand weather conditions. Beyond aesthetics, diatom-infused art promotes biophilic design, connecting viewers with nature. Some sculptures even harness diatoms' natural filtration abilities to purify surrounding air or water. This fusion of science and art represents a growing trend toward environmentally conscious public installations, blending creativity with sustainability. The use of diatoms also opens discussions about renewable resources in large-scale art, setting new standards for eco-friendly urban design.