You've never seen graffiti like this.
Parisian street artist Astro is making his mark all over the walls of the world, but his latest work appears in the Portuguese city of Loures.
The intricate optical illusion makes passersby feel as though the wall will take them into a "deep and dark abyss," designboom explained. Astro used assorted colors of blue to create the incredibly trippy piece of work.
The paintings are part of a public art initiative called Loures Arts Publica.
According to his website, Astro is entirely self-taught and frequently uses curves, calligraphy and shapes in his abstract art.
We can't wait to see where else his work pops up.