When discussing outdoor sculptures, few consider their interaction with microwaves—yet some iconic artworks are deliberately designed to be "invisible" to radar and microwave frequencies. These sculptures often incorporate radar-absorbing materials like carbon fiber or specialized coatings, blending artistic vision with scientific innovation.

One notable example is "Cloud Gate" (The Bean) in Chicago. While not entirely microwave-invisible, its polished stainless steel surface scatters radar waves, reducing detectability. Similarly, "The Spire of Dublin", a towering stainless steel needle, reflects microwaves unpredictably due to its smooth, angular design.

More intentionally, military-funded projects like "Stealth Art" installations use composite materials to evade radar detection, though their exact locations are often classified. Publicly accessible works like "Wave Field" by Maya Lin at the University of Michigan employ undulating earthworks that diffuse microwave signals naturally.

These sculptures challenge perceptions of art’s role in technology, proving creativity can intersect with electromagnetic science in unexpected ways. Whether for aesthetic or functional purposes, they redefine public spaces as zones where art literally bends the rules of physics.