The Chile-Argentina border is a long international boundary that stretches approximately 5,300 kilometers (3,300 miles) along the Andes Mountains. It separates the countries of Chile and Argentina, running from the southern tip of South America to the northern regions, where it meets Bolivia and Peru. This border is notable for its diverse landscapes, including mountains, forests, and deserts. It is also home to several important landmarks, such as the Patagonian region and the Atacama Desert. The border is marked by various treaties and agreements that have been established over the years to manage territorial disputes and promote cooperation.