Rail transport in Argentina served by train, departing from Constitucion, Once and Retiro terminus located in the centre of Buenos Aires. Some cities currently are: Mar del Plata, Rosario (both stations, Norte and Sur, Córdoba, General Pico, Santa Rosa, Rufino and San Miguel de Tucumán. Other regional services are operated by their respectives Provinces, such as Tren a las Nubes (operated by the Government of Salta) and Servicios Ferroviarios Patagónico (also known as "Tren Patagónico") by the Río Negro Province. Buenos Aires Córdoba Entre Ríos Misiones Patagonia Rosario Salta Tierra del Fuego There are several private freight operators in Argentina, along with the state-owned
Salta–Antofagasta railway ("train to the clouds"), running between Salta and La Polvorilla. Nowadays, apart from some suburban trains running from Salta to Campo Quijano, the "Tren a las Nubes" is the only passenger train serving the line, after the cancellation of the "Tren Mixto" Salta-Socompa, that once linked Socompa with Tucumán and Buenos Aires (Retiro Station), via Córdoba and Rosario. The Chilean part of the line, also served only by freight trains, was the site of a proposed commuter rail line on the route running through Antofagasta. Salta–Antofagasta railway The Salta–Antofagasta railway, also named Huaytiquina, is a non-electrified single track railway line