Andean Mountains (America) from Space. Elements of this image furnished by Nasa

The Andes or Andean Mountains (Spanish: Cordillera de los Andes) are the longest continental mountain range in the world. They form a continuous highland along the western edge of South America. This range is about 7,000 km (4,300 mi) long, about 200 to 700 km (120 to 430 mi) wide (widest between 18° south and 20° south latitude), and of an average height of about 4,000 m (13,000 ft).