Outdoor sculptures designed for sonar or echolocation viewing are rare but fascinating examples of inclusive art, often created for visually impaired audiences or to explore alternative sensory experiences. One of the most renowned is *Echoes* by artist Bruce Williams, a large-scale installation in Seattle that uses textured surfaces and hollow structures to produce distinct sound reflections when scanned with a sonar device. Another notable piece is *Sound Shadows* by UK-based collective Tactile Arts, which incorporates resonant materials like bronze and aluminum to create interactive sonic landscapes.

In Denmark, the *Whispering Walls* project in Aarhus features undulating concrete forms that reflect sound waves in unique patterns, allowing users with sonar devices to "see" the sculpture through auditory feedback. Similarly, Japan’s *Harmonic Fields* by Yuri Suzuki integrates wind-activated chimes and sonar-responsive surfaces, blending music and tactile exploration.

These sculptures challenge traditional visual-centric art by prioritizing sound and touch, offering a multisensory experience that redefines accessibility in public art. Their innovative designs inspire conversations about how technology can bridge gaps in artistic perception.