Lagoa Mirim is a large estuarine lagoon stretching from the southern part of the Rio Grande do Sul state in Brazil to eastern Uruguay. It is separated from the Atlantic Ocean by a sandy isthmus and is partly barren.

With the longest shoreline of all of the Great Lakes, Lake Huron is one of the most unique lakes on Earth. It is the second largest of the Great Lakes, and the fourth largest lake in the world by surface area. Huron is renowned for its beaches, sand dunes, wetlands, forests, and extensive river systems.

Lake Superior is the largest freshwater lake in the world by surface area. It is the world's third-largest freshwater lake by volume and contains nearly 10% of the word’s fresh surface water. Lake Superior is relatively young, approximately 10,000 years old dating back to the last glacial retreat. The Lake Superior watershed includes the surrounding areas of Ontario, Minnesota, Wisconsin and Michigan.

The Great Lakes are a group of five large freshwater lakes located in North America on the border between the United States and Canada. They are the largest group of freshwater lakes by total area in the world and hold about 21% of the world's surface fresh water.