Laguna Mar Chiquita, also known as Mar de Ansenuza, is a vast endorheic salt lake sprawling across the northeast of Córdoba Province in central Argentina, with its northeastern corner extending into southeastern Santiago del Estero Province. Nicknamed "the Córdoba sea," this inland body of water is the largest naturally occurring saline lake in Argentina and one of the most significant wetland ecosystems in all of South America. The lake sits at an elevation of roughly 66–77 meters above sea level and occupies the southern portion of a depression measuring approximately 80 km north–south by 45 km east–west. Its surface area fluctuates dramatically due to its shallow depth — averaging around 10 meters maximum — ranging anywhere from 2,000 to 6,000 km² depending on climatic conditions. The surrounding climate is sub-tropical and humid, and the entire lake and its surrounding wetlands were officially designated as Ansenuza National Park in June 2022, making it the largest national park in Argentina, protecting over 19,000 km² of lagoons, marshes, and forests.