3D Grass Globe at Paris City Hall
Artist François Abélanet plays tricks on our eyes, making us believe there is a three-dimensional grass globe sitting right in the middle of Paris' City Hall. When viewed at different angles, however, the illusion quickly falls apart. Who to believe? covers 16,000 sq ft (1500 sq m) and measures 330 ft (100 m) long. Approximately 90 gardeners worked for five days to assemble the entire display.