Astro's abstract art mixes curves, calligraphy and dynamic shapes, and his work has been seen at festivals all over the world. This particular gigantic three-dimensional optical illusion artwork was erected as part of a public urban art initiative, Loures Arte Publica, that recently took place in the municipality, with other offerings from national and international artists ranging from graffiti and street art to photography and sculpture. Astro's creation was comprised of various layers of blue geometric design that were optically oriented to appear as if a tunnel was running through the apartment block.