1. Cotopaxi is an active stratovolcano in the Andes Mountains located on "volcano boulevard." it is one of South America's most famous volcanoes and one of its most active ones. With its 19,347 ft, it also ranks among the world's highest active volcanoes.
2. The Cerro Tololo Inter-American Observatory is an astronomical observatory located in Chile and it is one of the world's largest observatories.
