Rideau Canal

The Rideau Canal is a 202 kilometre long canal that links the Ottawa River, at Ottawa, with the Saint Lawrence River 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.Opened in 1832 for commercial shipping, freight was eventually moved to railways and the St. Lawrence Seaway, and it remains in use today for pleasure boating, operated by Parks Canada May to October. It is the oldest continuously operated canal system in North America, and is a UNESCO World Heritage Site.

Source: Wikipedia