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See the world's first "invisible" skyscraper

The crystalline skyscraper will be designed to look different depending on how far away the viewer stands.

World's first invisible skyscaper can disappear before your eyes

The Tower Infinity skyscraper going up outside of Seoul, South Korea,

will be invisible — sort of. The glass-spired skyscraper, which recently

received a construction permit, will incorporate optical technology to

make it appear as if it's not really there during the day. Here's a

preview of the award-winning design.