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Niagra Caves

It's been 90 years since three pigs unwittingly discovered one of Minnesota's hidden treasures.

http://www.digtriad.com/video/3667073277001/1/Niagra-Caves http://bcdownload.gannett.edgesuite.net/wfmy/34300080001/201407/1148/34300080001_3667077447001_th-53bde2e5e4b0dc62d4f476ca-782203288001.jpg?pubId=34300080001 Niagra Caves It's been 90 years since three pigs unwittingly discovered one of Minnesota's hidden treasures. 02:03

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