A seaway is a navigable water route that allows ships and boats to travel between different bodies of water. It can include rivers, lakes, and coastal areas, facilitating trade and transportation. Seaways are essential for connecting ports and enabling the movement of goods and people across regions. One of the most famous seaways is the St. Lawrence Seaway, which links the Great Lakes to the Atlantic Ocean. This system of locks and channels allows large vessels to navigate inland, significantly boosting trade for countries like Canada and the United States.