Rideau Canal, Historic waterway in Ontario, Canada
The Rideau Canal is a historic waterway in Ontario, Canada, stretching 202 kilometers from Ottawa to Kingston and linking natural waterways through 47 locks that manage elevation changes. The canal passes through forests, farmland, and small towns, with lock stations built mostly from gray stone and operated by hand.
Engineers completed the canal in 1832 under Lieutenant Colonel John By to establish a secure military route following concerns about American expansion. The canal later shifted to civilian use and gradually lost its original strategic purpose, but remained in operation as a transportation route.
The canal takes its name from the Rideau River, which flows along part of its route and whose French name refers to the curtain-like waterfalls at the rapids. Today, locals and visitors use the waterfront promenades for walking, cycling, and picnicking, while recreational boats pass through the locks during warmer months and skaters populate the frozen surface in winter.
The canal has 24 lock stations with hand cranks that allow vessels to move between different water levels as they travel through the eastern Ontario region. Visitors can watch the locks operate from the shore or explore towpath trails along different sections, with many stops offering picnic tables and information panels.
During winter months, a 7.8-kilometer section of the canal freezes to form a natural skating surface in the center of Ottawa. This section has been recognized in the Guinness Book of Records as the largest naturally frozen skating rink in the world and draws thousands of skaters daily.
Location: Ontario
Part of: Rideau River
GPS coordinates: 45.42639,-75.69805
Latest update: December 4, 2025 23:02
Navigation locks are engineering structures that enable ships to pass through significant elevation changes between seas, lakes, and rivers. From the Panama Canal, where vessels rise 86 feet (26 meters) to cross the Isthmus, to the Three Gorges Dam in China, featuring five-stage locks managing a 371-foot (113-meter) height difference on the Yangtze River, these technical facilities have transformed global trade routes. The Soo Locks in the United States connect the Great Lakes, while the Kiel Canal in Germany links the North Sea to the Baltic Sea. Some structures, such as the Itaipu Dam between Brazil and Paraguay, combine navigation and hydroelectric power generation with a capacity of 14,000 megawatts. Others stand out with their innovative technical solutions: the boat lift in Peterborough, Canada, has used a hydraulic system since 1904, while the Falkirk Wheel in Scotland employs a rotating mechanism to lift 24 meters (79 feet). These facilities play a crucial role in international commerce and economic growth of the regions they serve.
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