This is Leandro Erlich’s Swimming Pool, located at the 21st Century Museum of Contemporary Art, Kanazawa, Japan. Though similar installations have appeared elsewhere, the Kanazawa pool remains the original and most famous. From above, it looks like a normal swimming pool, but beneath the thin layer of water on glass is a full room where visitors can walk freely. This clever design creates the surreal illusion of standing or floating underwater, making it one of Japan’s most iconic and photograph