Street artist Pejac (previously on Neatorama) visited Brooklyn, New York City, and created this optical illusion art titled "Fossil."
The artwork looks like the image of a tree made from missing bricks on the building's wall - but in actuality, Pejac created that illusion by spray painting "shadows" on the individual bricks.
From the artist's Instagram:
‘Fossil’ works as a harbinger of a hypothetical fatal future where the only memory we have of nature is the fossilized form of a tree in a brick wall.