The Rideau Canal is the best preserved slackwater canal in North America. Built in the early 19th century, it originally functioned as a military barrier between the U.S. and the British forces defending the colony of Canada. It is the only example from the 19th century canal-building era that operates on its original path with most of its structures intact, flowing south from Ottawa to the Kingston Harbor on Lake Ontario along 125 miles of the Rideau and Cataraqui rivers.
—Prepared by the World Tribune staff
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