Question: In what country did The Mission of Nahuel Huapi on the Nahuel Huapi Lake exist?

Context paragraphs:
Bariloche: San Carlos de Bariloche, usually known as Bariloche (] ), is a city in the province of Río Negro, Argentina, situated in the foothills of the Andes on the southern shores of Nahuel Huapi Lake.  It is located within the Nahuel Huapi National Park.  After development of extensive public works and Alpine-styled architecture, the city emerged in the 1930s and 1940s as a major tourism centre with skiing, trekking and mountaineering facilities.  In addition, it has numerous restaurants, cafés, and chocolate shops.  The city has a permanent population of 108,205 according to the 2010 census.

Cathedral of Our Lady of Nahuel Huapi: The Cathedral of Our Lady of Nahuel Huapi (Spanish: "Catedral de Nuestra Señora del Nahuel Huapi" ) Also San Carlos de Bariloche Cathedral Is the main Catholic temple of the city of San Carlos de Bariloche, in Argentina.  It is located at the intersection of Almirante O'Connor and Beschtedt streets, surrounded by two squares with beautiful gardens, and corresponds to the Diocese of Bariloche, suffragan of the Archdiocese of Bahía Blanca.

Nahuel Huapi National Park: Nahuel Huapi National Park (Spanish: "Parque Nacional Nahuel Huapi" ) is the oldest national park in Argentina, established in 1934.  It surrounds Nahuel Huapi Lake in the foothills of the Patagonian Andes.  The largest of the national parks in the region, it has an area of 7050 km2 , or nearly 2 million acres.  Its landscapes represent the north Patagonian Andean Zone consisting of three types, namely, the Altoandino (with perpetual snow above an altitude of 1600 m ), the Andino-Patagónico (in the lower reaches of the hills) and the Patagonian steppe.  It also represents small parts of the Valdivian Rainforest.

Los Arrayanes National Park: Los Arrayanes National Park (Spanish: "Parque Nacional Los Arrayanes" ) is a national park of Argentina with an area of 17.53 square kilometres.  It covers the Quetrihué Peninsula on the shore of the Nahuel Huapi Lake in the province of Neuquén, 3 km from Villa la Angostura.

Gutiérrez Lake: Gutiérrez Lake (Spanish: Lago Gutiérrez ) is a lake of the lake region of northern Patagonia in the province of Río Negro, in Argentina.  It is of glacial origin, being a Moraine-dammed lake.  The lake is connected to Nahuel Huapi Lake.

Nahuelito: Nahuelito is a lake monster reported to live in Nahuel Huapi Lake, Patagonia, Argentina.  Like Nessie, the Loch Ness Monster, the Argentine creature is named after the lake she resides in and has been described as a giant serpent or a huge hump, as well as a plesiosaur.  Nahuelito has been allegedly shown through photos showing a hump, or a serpentine body.

Poya people: The Poya were a subgroup of indigenous Tehuelche people living in the Andes of Llanquihue and Palena Province as well as on the southern shores of Nahuel Huapi Lake in present-day Argentina.  The Jesuit priest Nicolás Mascardi divided the Poya language into two linguistically distinct groups the one spoken by the "comarcanos" of Nahuelhuapi and another one spoken further east as far away as to the Atlanctic Ocean.

Mission of Nahuel Huapi: The Mission of Nahuel Huapi was an intermittent Jesuit mission that existed in colonial times on the shores of Nahuel Huapi Lake, northern Patagonia.  The exact location of the missions are not known but it has been suggested, based on a Christian grave finding, that the mission of the early 18th century was located in Huemul Peninsula.

Nahuel Huapi Lake: Nahuel Huapi Lake (Spanish: "Lago Nahuel Huapí" ) is a lake in the lake region of northern Patagonia between the provinces of Río Negro and Neuquén, in Argentina.  The lake depression consists of several glacial valleys carved out along faults and Miocene valleys that were later dammed by moraines.

Traful Lake: Traful Lake is a lake in the Los Lagos Department of the Argentine province of Neuquén with an area of 76 km².  The lake is the starting point of the Traful River that empties into the Nahuel Huapi Lake.  It is contained inside Nahuel Huapi National Park.

Supporting paragraphs: Mission of Nahuel Huapi Nahuel Huapi Lake
Answer: Argentina