Canada is home to an extensive network of water bodies, including lakes, rivers, and oceans. The country boasts over two million lakes, covering about 9% of its total land area. Notable lakes include Lake Superior, the largest freshwater lake in North America, and Lake Ontario, which is part of the Great Lakes system. Rivers in Canada, such as the Mackenzie River and the St. Lawrence River, play crucial roles in transportation and ecology. Additionally, Canada has coastlines along the Atlantic, Pacific, and Arctic Oceans, making it one of the countries with the longest coastlines in the world.