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The '''Rideau Canal''' is a waterway spanning the distance between [[Ottawa]], [[Ontario]], [[Canada]] and the city of [[Kingston]], [[Ontario]], [[Canada]], and was originally opened in 1832. The canal was built as a defense against "[[American]] aggression," something that would have been without precedent at the time.
Today, the canal system is used alternately as a theoretical defense and a skating rink. In 2007, the site was designated a [[UNESCO World Heritage Site]].