The mountain range known for being the longest in the world is the Andes. Stretching over 7,000 kilometers along the western coast of South America, this impressive range spans multiple countries, including Chile, Argentina, and Peru. The Andes are renowned for their diverse ecosystems, rich cultural history, and significant biological diversity. This mountain range is crucial for regional climate and agriculture, as it influences weather patterns and provides natural resources. The Andes also offer stunning landscapes and are popular for outdoor activities.