Switzerland
The Andes Mountains line the western edge of South America, from Venezuela all the way along Chile to South America’s southern tip (about 9,000 km in all), making them the longest mountain range in the world. Along that route, they cross through Ecuador, Peru, and Bolivia. By width, they cross into Argentina, which borders with Chile. The Andes are one of the tallest mountain ranges, too, trailing only the Himalayas of Asia in height. Many summits (tops of the mountains) reach higher than 20,000 feet.