Saltwater lakes are bodies of water that have a higher concentration of salt than freshwater lakes. They often form in arid regions where evaporation exceeds precipitation, leading to the accumulation of salts. Examples of saltwater lakes include the Great Salt Lake in the United States and the Caspian Sea, which is technically the largest enclosed inland body of water. These lakes can support unique ecosystems, often home to specialized organisms like brine shrimp and certain types of algae that thrive in high salinity. Saltwater lakes can also be important for local economies, providing resources such as salt and attracting tourism for recreational activities.