Outdoor sculptures that integrate rainwater collection are not only visually striking but also serve a functional purpose, merging art with sustainability. One notable example is "Rainwater Pavilion" by Marjan van Aubel, a solar-powered structure that collects and purifies rainwater while showcasing innovative design. Another iconic piece is "Cloud Arbor" by Ned Kahn, which uses wind and rain to create dynamic visual effects while channeling water for reuse.

In Barcelona, the "Bofill's Rainwater Harvesting Sculpture" combines geometric beauty with water conservation, filtering rainwater through its intricate design. Similarly, "The Water Cathedral" in Chile by Grupo Talca is a monumental installation that collects and stores rainwater, transforming it into a public resource.

These sculptures highlight how art can address environmental challenges, turning public spaces into hubs of creativity and sustainability. By incorporating rainwater collection, they inspire communities to rethink water usage and appreciate the intersection of art and ecology.