The longest chain of mountains in the world is the Andes. Spanning over 7,000 kilometers (approximately 4,300 miles) along the western coast of South America, the Andes run through seven countries: Venezuela, Colombia, Ecuador, Peru, Bolivia, Chile, and Argentina. This majestic mountain range is characterized by its diverse ecosystems, ranging from tropical rainforests to high-altitude deserts. The Andes are home to numerous iconic peaks, including Aconcagua, the highest mountain in South America. The mountains hold significant cultural and historical importance for indigenous peoples and have been a site for various economic activities, including mining and agriculture.