Visitors interact with sensors causing 25,000 water droplets a minute to travel along the channels, then collide and split before pooling into a lake.  Photo 7 of 11 in The PyeongChang Winter Olympics in South Korea Debuts the Darkest Building on Earth

The PyeongChang Winter Olympics in South Korea Debuts the Darkest Building on Earth

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Visitors interact with sensors causing 25,000 water droplets to travel along the channels per minute.