Aconcagua
Aconcagua (), with a summit elevation of , is the highest mountain in both the Southern and Western Hemispheres. It is located in the Andes mountain range, in the Mendoza Province, Argentina, and lies northwest of its capital, the city of Mendoza, about from San Juan Province and from the international border with Chile. The mountain itself lies entirely within Argentina, immediately east of Argentina's border with Chile. Its nearest higher neighbor is Tirich Mir in the Hindu Kush, away. It is one of the Seven Summits.
Argentine Monte
The Argentine Monte is in north-central Argentina, and has an area of .
It is to the east of the Andes and extends from Salta Province in the north to Chubut Province in the south.
It covers the eastern foothills of the Andes.
The ecoregion merges into the Patagonian steppe in the south, where it extends east to the Atlantic Ocean. 
In the north it lies between areas of Dry Chaco and Southern Andean Yungas to the east, and Central Andean puna and Southern Andean steppe to the west. 
In south it lies between Espinal to the east and Patagonian steppe to the west.