Buenos Aires (i.e. mayor) in 1996; previously, the mayor was directly appointed by the President of the Republic. Buenos Aires is considered an 'alpha city' by the study GaWC5. Buenos Aires' quality of life was ranked 91st in the world, being one of the best in Latin America in 2018. It is the most visited city in South America, and the second-most visited city of Latin America (behind Mexico City). Buenos Aires is a top tourist destination, and is known for its preserved Eclectic European architecture and rich cultural life. Buenos Aires held the 1st Pan American Games in 1951 as well
Buenos Aires its geomorphology along with an inadequate drainage network, the city is highly vulnerable to flooding during periods of heavy rainfall. The Executive is held by the Chief of Government (), elected for a four-year term together with a Deputy Chief of Government, who presides over the 60-member Buenos Aires City Legislature. Each member of the Legislature is elected for a four-year term; half of the legislature is renewed every two years. Elections use the D'Hondt method of proportional representation. The Judicial branch is composed of the Supreme Court of Justice (Tribunal Superior de Justicia), the Magistrate's Council (Consejo de la