Once the droplets have collected, they then collide and split before being pooled into a lake.  Photo 8 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

8 of 11

Once the droplets have collected, they then collide and split before being pooled into a lake.