1. The Great Lakes: Located in North America, these five freshwater lakes (Superior, Michigan, Huron, Erie, and Ontario) make up the largest system of freshwater lakes in the world.

2. The Caspian Sea: This inland saltwater sea in Eurasia is the largest enclosed body of water on Earth.

3. Lake Baikal: Found in Siberia, Russia, Lake Baikal is the deepest lake in the world and also holds the largest volume of freshwater.