The Baritú National Park is a national park of Argentina, located in the Santa Victoria Department, in the north of the province of Salta, in the Argentine Northwest. It has an area of 720 square kilometres and it is the only tropical park in the country.

The park was created in 1974. It is bordered by mountains. The protected area belongs to the Yungas ecosystem, which is composed of Sub-Andean hills measuring 300 to 400 m in height. The climate is wet and hot, with summer rainfall that goes from 900 to 1300 mm.

The fauna of the park includes several endangered species, such as the yaguareté and the onza.

The cedro salteño trees ("Salta cedrelas") reach huge sizes in this region. Their wood is considered extremely valuable.

The Campo de los Alisos National Park is a national park of Argentina, located in the Chicligasta Department, province of Tucumán. It has an area of 100 square kilometres.

This national park was created in order to protect a representative sample of the montanos jungle and forest ecosystem. Annual rainfall here oscillates between 100 and 200 mm.

The park is located on the eastern slope of the Nevados del Aconquija. The Aconquija mountains are the southern extension of the Calchaquíes Valleys, the western first steps raising from the Chaco-Pampean plain.

Flora and fauna vary considerably with the different heights, from a jungle at lower levels to snow-covered mountainous terrain at 5,000 m.

The El Leoncito National Park is a national park of Argentina, located at the Calingasta Department, in the southwest of the province of San Juan. It has an area of 760 km². It was created in 1994 as a reserve and became a national park in 2002, in order to protect representative samples of the Puna and High Andean scrublands, as well as historical and paleontological sites (including a portion of the Inca's Way).

Given the lack of atmospheric pollution in this area, it is particularly suitable for astronomical observations. Within the park are two astronomical observatories: Félix Aguilar Observatory and the Leoncito Astronomical Complex. (Compare this with Mount Catequilla in Ecuador, as described under Astronomical observations in the article about the equator.)

The climate is cold, with permanent ice, in the High Andean region. In the Puna, the climate is cold and dry, with large thermical amplitudes. The average annual rainfall is 200 mm. The flora is mostly made up of shrubs, typical of dry mountainous areas. The fauna include important species like the guanaco and birds of prey such as the peregrine falcon (the fastest bird on Earth).

The Los Alerces National Park is a national park in Chubut Province, Argentina, some 30 miles from Esquel. It is a park of 2,630 square kilometres along the border with Chile, best known for the alerce (lahuan) trees (Fitzroya cupressoides) from which the park takes its name.

The park was created in 1937 in order to protect the alerce forest, and other typical examples of the flora of the Patagonian Andes. The National Park has the largest alerce forest of Argentina. Alerce is one of the longest-living trees in the world; some in the park are around 3,000 years old, with many of them over 1,000 years. It grows very slowly and belongs to the family Cupressaceae. The principal forest in the park, visited by tourists, is at Puerto Sagrario at the northern end of Lago Menéndez. Arrayán (Luma apiculata) trees can be seen along the Arrayanes river.

In the west of the park, there is high rainfall and Valdivian temperate rain forests below the high Andes mountains. Much of the rest of the park is Patagonian forest similar to the Lanín and Nahuel Huapi National Parks, with coihues and lenga in addition to the alerce. There is a complex lake system with many rivers. The most important are the Menendez, Rivadavia, Futalaufquen and Krüger lakes, and the Frey river. A hydroelectric dam, providing energy to industry in Puerto Madryn, has created the large artificial Lake Amutui Quimei, which empties into the Futaleufú River which flows on to Chile. The Torrecillas glacier can be seen from tour boats.

The Predelta National Park is a national park of Argentina, located in south-west of the province of Entre Ríos, 6 km south from Diamante, in the Argentine Mesopotamia, at the beginning of the Paraná River Delta. It has an area of 24.58 square kilometres.

The park was created in 1992 to protect a sample of the Upper Delta of the Paraná, which belongs to the Paraná Delta and Islands Ecoregion. The Predelta is the area where the sediments of the Paraná start forming islands, while the river itself splits into several major arms and many smaller watercourses.