9. Mar Chiquita Lake
Area: 772 mi²
Basin countries: Argentina
Mar Chiquita Lake or Mar de Ansenuza is located northeast of the province of Córdoba in central Argentina. It is an endorheic salt lake. Endorheic salt lakes are formed when water basins do not allow outflow of water and retain water within. Over time water evaporates, and leaves behind a body of water that has a high concentration of heavier mineral elements and various types of salts.