Lake Argentino is the largest freshwater lake in the country, at 362,255 acres. The lake is located in the province of Santa Cruz, within Los Glaciares National Park. Lake Argentino appears whitish-green because of the lime in the glacial water that feeds the lake from several rivers and streams, according to Lake Lubbers. Fishing for rainbow trout, lake trout and perch is popular at Lake Argentino, despite its cold water.
Lake Nahuel Huapi is 650 square kilometers and 454 meters deep at its deepest point. According to Patagonia-Argentina, while there are other lakes nearby, including Guillemo, Mascardi and Traful, Lake Nahuel Huapi is considered the most important one in the region and lends its name to Nahuel Huapi National Park.
The Rio de la Plata is 270 kilometers long, and is formed by the Parana River and Uruguay River, which join before the Rio de la Plata meets the Atlantic Ocean. Buenos Aires serves as one of the chief ports along the river, which is considered a main channel into South America, according to Encyclopedia.com.
Iguazu Falls, which formed after a volcanic eruption, are taller and twice as wide as Niagara Falls, with 275 cascades over almost two miles that comprise the Iguazu River, according to Travelsur. An average of 553 cubic feet of water pours down the 269-foot falls every second. The falls lie between Argentina and Brazil, with two-thirds of the falls on the Argentinean side in Iguazu National Park.
Lake Puelo is located in a valley 200 meters above sea level in the Andean National Parks. The lake drains into the Pacific Ocean through the Puelo River. The lake's surroundings feature both the Andean-Patagonian flora, such as cypress and radal, and the Chilean Valdivian jungle vegetation, such as elms and hazel trees, according to Patagonia-Argentina. Visitors can swim in the lake's warm waters.
