The Rideau Canal is a UNESCO World Heritage Site, the oldest canal in North America still in operation, built when Ottawa did not exist and Canada was still designated as part of the British Empire. Today, it is one of Ottawa's landmarks, and speaks volumes about its history. The Rideau Canal was built between 1826 and 1832 by British army lieutenant-colonel John By and his men. It links Ottawa, on the Ottawa River, to Kingston, on Lake Ontario. When the project to build the canal was proposed, the British Empire was seeking to defend itself against potential attacks from the United States. Forts and canals were built here and there to defend their new territories.
