Not everything is quite as it seems. This beautiful piece of land art is actually a 3D mind-bending optical illusion that was in front of Paris’ City Hall two years ago. What may seem like an enormous grass ball is actually layers of flat land pieced together in a specific sequence. François Abelanet, a Parisian architect and artist who designed this work of art called it “qui croire?” (who to believe?). The name is exceptionally fitting for if you were to view the land art from the side you would see a stretch of land having a combination of pointed, curved and round grass hills. However, when viewed at a particular angle, one that Abelanet had set up for viewers at the base of the sculpture, the image jumps out at you revealing a perfectly 3D round shaped sphere. A truly remarkable masterpiece, which covered 1500sqm, measured 100m long and used 1200sqm of lawn. The entire display took approximately 5 days to complete with 90 gardeners working on it.