The Rideau Canal is a historic waterway that connects the city of Ottawa, Ontario, Canada to the St. Lawrence River. It was built in the early 19th century to provide a safe and secure route for the transport of goods and people between the two locations.
From Wikipedia
The Rideau Canal is a 202-kilometre long canal that links the Ottawa River at Ottawa with the Cataraqui River and Lake Ontario at Kingston, Ontario, Canada. Its 46 locks raise boats from the Ottawa River 83 metres upstream along the Rideau River to the Rideau Lakes, and from there drop 50 metres downstream along the Cataraqui River to Kingston.