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America's Longest Navigable Underground River Is A Clear Water Beauty In The Midwest
A sinkhole opened up on a Midwest dairy farm in 1940 to reveal an underground river, a 21-mile cave system and rare creatures ...
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Address: 110024, 4F, No.1, City Hall Rd., Xinyi District, Taipei, Taiwan, R.O.C. For callers in Taipei City please dial 1999(Chinese) for the Citizen Hotline; For callers outside of Taipei City, ...