This clip shows a high-resolution digital billboard in South Korea displaying an anamorphic-illusion video of a wave breaking in tank atop a building in COEX K-Pop Square in Seoul. “Wave” was created by DStrict, a Korean digital design agency based in the capital, and is said to be the world’s largest ever anamorphic illusion. The digital billboard is about 80 meters wide and 20 meters tall. Impressive and breathtaking.