Water borders are the boundaries that separate different countries or regions and are defined by bodies of water such as rivers, lakes, and oceans. These borders can be established through treaties or historical agreements and are important for determining territorial rights, navigation, and resource management. Countries often have specific laws governing their water borders, which can include fishing rights and shipping lanes. Disputes over water borders can arise, leading to negotiations or conflicts. Examples of water borders include the Rio Grande between the United States and Mexico and the Great Lakes shared by the United States and Canada.