Artist François Abelanet 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.
The official press release states that the installation is supposed to "question the link between nature and city, and their difficult coexistence."
Side view reveals the actual shape
Five day installation of the piece
Aerial view of the installation process
Photo credit: Mairie de Paris / Deborah Lesage
via [Paris], [Designboom], [Gizmodo]