The wall fountain is a large structure exceeding 100 m in total length and is installed in the biopark. The image generated by blasting water from nozzles installed on a 18 mm powerglass at a constant distance gives an effect as if the image were actually displayed on water. In addition, using a special conductor with excellent watertight effect, LED lighting technique without visible wires is applied on the glass to display images in both directions. The video’s motif is the ghost whale, now extinct in Korea, and carries the story of already extinct or disappearing lifeforms.