Buenos Aires is the 9th. largest city in the world

And the hub of the southern cone, is a sprawling metropolis rising from the Rio de la Plata and stretching more than 200 square km (75 square miles)to the surrounding pampas, the fertile Argentinian plains. With more than one-third of the country's 39 million inhabitants living in or around Buenos Aires, the city is the political, economic, and cultural center of Argentina and the gateway to the rest of the country.