Flowing through the remote grasslands and wetlands of Corrientes province in northeastern Argentina, the Río Aguapey is a wild, largely undeveloped river system that winds through one of South America's most ecologically significant landscapes. The river basin has been recognized as an Important Bird Area (IBA), reflecting the exceptional biodiversity of the surrounding region — a characteristic that extends to the river's aquatic life as well. For anglers seeking an off-the-beaten-path experience in the heart of Argentina's subtropical interior, the Río Aguapey offers a genuine wilderness fishing adventure far removed from the more heavily visited waters of the region.