3. Cayetano Ferrer
At first glance, you may miss Cayetano Ferrer’s street art because it is camouflaged into the existing environment, looking almost transparent. To create his optical illusions on street signs and other objects, Ferrer cleverly takes a photo of the environment behind whatever he is using as his canvas, and then covers the object he is working with in a print of the photo, making the object appear as though you can see through it. The Los Angeles-based artist’s work will definitely make you do a double take.