Stereograms, or images that reveal hidden 3D illusions when viewed correctly, have inspired some remarkable outdoor sculptures. These artworks challenge viewers to engage deeply, merging optical tricks with public art. Here are some of the most famous examples:

1. "Magic Eye" Monument (Unknown Artist, Various Locations) – Though not a single sculpture, many public installations mimic the "Magic Eye" style, encouraging viewers to cross their eyes and uncover hidden shapes.

2. "The Stereogram Wall" (San Francisco, USA) – A large mural-like sculpture featuring repetitive patterns that, when stared at, reveal a stunning 3D cityscape.

3. "Hidden Dimensions" (Berlin, Germany) – An abstract steel structure that appears chaotic until viewed as a stereogram, unveiling a floating sphere illusion.

4. "Eyescape" (London, UK) – A curved public artwork with intricate grooves, designed to create a shifting 3D effect when viewed from specific angles.

These sculptures transform ordinary public spaces into interactive experiences, proving that art can be both visually captivating and intellectually stimulating. Whether you’re a stereogram enthusiast or a casual observer, these works invite you to look closer—literally.