'Darkest building in the world' mesmerises at Pyeongchang Games Within the Pyeongchang Olympic Plaza stands a building like no other: the Hyundai pavilion is coated with Vantablack, a material which uses nanotechnology to absorb up to 99 percent of light, creating an impenetrable dark wall. In contrast to the stark exterior, conceptual art exhibits inside use water, mirrors and fibre-optic lighting to symbolise the use of hydrogen as a clean energy source. IMAGES AND SOUNDBITES++REFILE TO INCLUDE BACKGROUND INFO++