Established in 1934, the Nahuel Huapi National Park is the oldest national park in Argentina. 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 7,050 km2 (2,720 sq mi), 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 1,600 metres (5,200 ft)), the Andino-Patagónico (in the lower reaches of the hills) and the Patagonian steppe. I't also represents small parts of the Valdivian Rainforest. The park and the reserve lie at an altitude of 720--3,574 metres (2,360--11,726 ft), and are designated under IUCN management categories II (National Park) and IV (Management Reserve). The park is completely protected while the reserve is partially protected. The national park is dominated by the high mountain chain of the Andes, many lakes, rapid rivers, waterfalls, snow-clad peaks, glaciers and extensive forests. It is bordered by Chile on its western side. The park covers approximately 7,050 square kilometres (2,720 sq mi). It is located in the southwest section of the Neuquén and northwest section of the Río Negro provinces, bordering with Chile. The park has two zones: the park and the natural reserve with development concentrated in the reserve. The largest city and a base for tourism is San Carlos de Bariloche, which is surrounded by the park. San Carlos de Bariloche is the main hub when visiting the lake, and is known as the "Gateway to Patagonia", the "Chocolate Capital" and the "Honeymoon Capital" of Argentina. However, the city and other settlements are zoned outside the limits of the park. A further subzoning into the north, south and southern zones has been implemented with an exclusive recreational area named the Cerro Cathedral. Villa La Angostura is another lakeside resort also within the boundaries of the park. The area is known as the Argentine Lake District, as there are many lakes in the park, including Nahuel Huapi, Mascardi, Gutiérrez, Traful, Guillelmo, and Perito Moreno Lakes. Cerro Catedral is a 2,388 metres (7,835 ft) high peak within the park and an important ski resort. Cerro Tronador, on the Chilean border, is the highest mountain in the park at 3,491 metres (11,453 ft). Bordering the park to the north is the Lanín National Park. Geological formations in the park and the reserve are generally tertiary rocks of volcanic origin coupled with andacites and porphyrys. The cliffs of the San Pedro Peninsula depict eroded glacial features and the lakes also show many glacial effects. The park has widely varying climatic conditions with the annual precipitation ranging between 300 and 500 millimetres (12 and 20 in). It rains more towards the Chilean border. Lake Nahuel Huapi is the largest and deepest clear water lake in the lake district of Argentina, with a depth of 425 metres (1,394 ft), . Located at the foot of the Andes Mountains at an altitude of 767 metres (2,516 ft), it measures 544 square kilometres (210 sq mi). The lake was discovered by the Jesuit priest Nicolás Mascardi in 1670 who also built a chapel on the Huemul Peninsula of the lake. The lake extends 100 kilometres (62 mi) across the border with Chile, and includes many fjords and the Valdivian temperate rain forest. The southern shore of the lake has many hotels and restaurant catering to the tourist industry. The Quetrihué Peninsula in the north of the lake has been set aside as a separate national park, Los Arrayanes National Park. The lake has many islands. The Forest Research station is located on one of them, Victoria Island, which is a natural reserve approachable by boats. Huemul Island hosted the Huemul Project, the Argentinean secret research project on nuclear fusion in 1949--1952. The park's ecology consists of Patagonian steppe at lower elevations and Valdivian temperate forests at higher elevations. It is notable for its rich wildlife due to its many biotopes, attributed to the varied altitude and precipitation range. Xerophytic Patagonian flora is dominant in the eastern half of the park while the western half is covered profusely with temperate rain forests. The dominant tree species in the park are the lengas, coihue, and the ñires. Other varieties of trees seen in the park are the Chilean cedar (Austrocedrus chilensis), Winter's bark (Drimys winteri), Myrceugenella apiculata, Lomatia ferruginea, Lomatia hirsuta, Alstroemeria aurantica, Fuchsia megellanica, bamboo Chusquea culcou, Mitraria cocinea and Embothrium coccineum.