Laguna La Amarga, also known as "Laguna del 7," is a historic wetland located near the town of Serrano in the southern reaches of Córdoba province, Argentina. Once considered a legendary destination among Argentine anglers, this natural lagoon earned a remarkable reputation for producing exceptionally large pejerrey, with fish reaching 2 kilograms — a size considered extraordinary even by national standards. The lagoon's fame was so widespread that it earned a cover feature in the renowned Argentine fishing magazine Weekend in 1993, which celebrated both the quality of its fishing and the natural beauty of this corner of southern Córdoba. Locally referred to as "Los Bañados de La Amarga," the site represents a historically significant wetland ecosystem that shaped the fishing culture of the entire southern Córdoba region for generations.