Laguna Oca is a stunning oxbow lake and wetland complex nestled within the Laguna Oca y Herraduras del Río Paraguay Biosphere Reserve, located just 10 kilometers south of Formosa city in northern Argentina's Formosa Province. Recognized by UNESCO in 2001 as part of the World Network of Biosphere Reserves, this remarkable floodplain system stretches across more than 100,000 hectares of the Paraguay River's alluvial plain, encompassing meanders, oxbow lakes, gallery forests, wetlands, savannas, and albardones (natural levees). The reserve is often called the "Path of Water" for its breathtaking mosaic of mirror-like lagoons, winding channels, and dense riparian forests draped in epiphytes, lianas, and orchids. With a subtropical and warm climate, Laguna Oca offers anglers an immersive fishing experience set against one of South America's most biodiverse wetland landscapes.