It includes the La Plata, Berisso and Ensenada partidos (departments).
Nevertheless, the main centres remain separated by two dense forest reserves: the "Punta Lara jungle" ("Selva marginal") by the River Plate, and the "Pereyra Iraola Park" ("Parque Pereyra Iraola") a few kilometers inland.
Eventually, it was decided to build a new city, La Plata, entirely designed to serve as the provincial capital.
These suburbs would go on to become an integral part of La Plata Partido municipality.
Neighboring Berisso and Ensenada, on the Río de la Plata shore, acted from then on as natural harbors for the new capital city of the Province, and gradually they also became integrated as a conurbation into Greater La Plata.