Rideau Canal, located in Ontario, Canada, stretches 202 kilometres from Ottawa to Kingston. Visitors can enjoy boating and skating on the world’s largest naturally frozen ice rink through downtown Ottawa. Notably, the canal is the oldest continuously operated canal system in North America, completed in 1832 for military defence after the War of 1812. Today, it is a UNESCO World Heritage Site, celebrated for its historical significance and well-preserved 19th-century engineering.