Outdoor sculptures have long captivated audiences with their grandeur and creativity, but some artworks hold a unique distinction: they are invisible to cosmic rays. These sculptures, often blending art with scientific intrigue, challenge our perception of visibility and materiality.

One notable example is James Turrell's "Roden Crater," an earthwork in Arizona designed to manipulate light and celestial phenomena. While not entirely invisible, its interaction with cosmic rays creates an ethereal experience. Similarly, Olafur Eliasson's "Weather Project" at Tate Modern plays with atmospheric conditions, creating illusions that defy conventional observation.

Another fascinating piece is "The Cloud" by Carlos Cruz-Diez, a kinetic sculpture that uses light and movement to appear transient, almost evading detection by high-energy particles. These artworks push boundaries, merging art, science, and the unseen forces of the universe.

Exploring these sculptures offers a glimpse into how artists reinterpret invisibility, making the intangible tangible in public spaces. Their legacy lies not just in form, but in their dialogue with the cosmos.