While walking through Turin's city middle,you might find yourself in front of a building with a piercing going right through its corner."Baci Rubati" ("Stolen Kisses") is the official name of this work, which was made by the architect Corrado Levi in collaboration with Cliostraat, and a group of artists with the objective of experimenting with art and architecture. When you arrive,pay attention to the sides of the piercing.
Source: atlasobscura.com