Mar del Plata is a city on the coast of the Atlantic Ocean, in Buenos Aires Province, Argentina. It is the seat of General Pueyrredón district. Mar del Plata is the second largest city in Buenos Aires Province. The name "Mar del Plata" is short for "Mar del Rio de la Plata," and means "sea of the Rio de la Plata basin" or "adjoining sea to the Plate region." Mar del Plata is one of the major fishing ports and the biggest seaside beach resort in Argentina.