Mar del Plata is an Argentine city located on the coast of the Atlantic Ocean, 400 km (249 mi) south of Buenos Aires. Mar del Plata is the second largest city of Buenos Aires Province. The name "Mar del Plata" had apparently the sense of "sea of the Río de la Plata region" or "adjoining sea to the Río de la Plata".[1] Mar del Plata is one of the major fishing ports and the biggest seaside beach resort in Argentina. With a population of 614,350 as per the 2010 census [INDEC], it is the 7th largest city in Argentina.
Reference: http://en.wikipedia.org/wiki/Mar_del_Plata%2C_Argentina