U The Andes, running along South America's western side, is among the world's longest mountain ranges. Its varied terrain encompasses glaciers, volcanoes, grassland, desert, lakes and forest. The mountains shelter pre-Columbian archaeological sites and wildlife including chinchillas and condors. From Venezuela in the north, the range passes through Colombia, Ecuador, Peru, Bolivia, Argentina and Chile. You see the mountains through the airplane window . What countries are the Andes Mountains in?
