The mountain range that extends across much of South America is the Andes. This impressive range runs along the western edge of the continent, spanning seven countries, including Venezuela, Colombia, Ecuador, Peru, Bolivia, Chile, and Argentina. The Andes are the longest continental mountain range in the world and host diverse ecosystems, from tropical to alpine environments. They are of great cultural importance to indigenous peoples and have a significant influence on regional climates and biodiversity, making them a critical geographical feature of South America.