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Bonnechere Caves were discovered in 1855 by a surveyor, who was amazed that water disappeared into the riverbank. The Bonnechere River flows through the Lanark Highlands, near Eganville it flows underground through the cave to reappear a bit further down. The first exploration took place one hundred years later, in 1955, by the retired World War II flying ace Tom Woodward......please continue reading: http://www.showcaves.com/english/ca/showcaves/Bonnechere.html
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