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 Earth7 of 11

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

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