Gran Bajo del Gualicho, Endorheic basin in Río Negro Province, Argentina.
Gran Bajo del Gualicho is an endorheic basin in northern Patagonia with extensive salt flats and surrounding cliff walls. The landscape shows the typical structure of the Patagonian steppe with a striking natural depression set into otherwise flat terrain.
The depression formed about 300 million years ago through repeated flooding by ancient seas, which left thick salt deposits. These geological processes created the conditions that shaped the landscape into what visitors see today.
The name comes from the Mapuche language and refers to an important spirit in indigenous Patagonian traditions. You can sense this spiritual connection in the wide-open landscape, which holds deep meaning for local communities.
The basin can be reached via Provincial Route 2 from San Antonio Oeste, located roughly 40 kilometers from the nearest town. Visitors should come prepared for a remote location with basic supplies.
The floor drops to about 73 meters below sea level, making it one of the deepest natural depressions in the Southern Hemisphere. This extreme depth creates a rare geological feature that stands out in the region.
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