In the middle of a small lake in Belgium, a rectangular piece of the water's surface is mysteriously glowing. This elusive light is the design of Belgian artist duo Karel Burssens and Jeroen Verrecht, aka "88888", whose works transform specific sites into art. Their otherworldly light installation, "Untitled", was created for the Horst Art and Music Festival, located on one of the two moats that surround the medieval Horst Castle.