St. Lawrence River: The St. Lawrence River is a major river in eastern Canada and the United States. It flows from Lake Ontario to the Gulf of St. Lawrence, and is the largest river in Canada by volume. The St. Lawrence River has been an important transportation route for centuries, and is today home to several important ports, including Montreal.
Ottawa River: The Ottawa River is a river that flows through the provinces of Quebec and Ontario in Canada. It is the fifth-largest river in Canada by volume, and is an important source of hydroelectric power. The Ottawa River is also a popular tourist destination, and is home to several white-water rafting and kayaking opportunities.