General Manuel Belgrano Railway projects to run passenger services between La Quiaca and San Salvador de Jujuy, both cities in Jujuy Province. The main lines departed from Retiro station in Buenos Aires to the north through the provinces of Buenos Aires, Santa Fe, Córdoba, Santiago del Estero, Tucumán, Chaco, Formosa, Salta, Jujuy, San Luis, Mendoza, San Juan, La Rioja and Catamarca. In 1876, Ferrocarril Central Norte started services from Córdoba to Tucumán. It was the first metre gauge in Argentina, mainly due to economic reasons. It had been built by the Argentine State to expand Central Argentine Railway network (Rosario-Córdoba), a British-owned company by
Formosa Province up to 45 °C The tropical weather is characterized with uniform annual rains in the east (1000 mm annual), while in the rest of the country winter is a drier season (80 mm). The humidity variation results in the jungle vegetation on one side, and the Chaqueño forest in the other. The limit with the Salta Province is known as the "Impenetrable" ("Impenetrable"). Formosa's protected areas are the Río Pilcomayo National Park and the Formosa National Reserve. Coincidentally, part of the province is the antipode to northern Taiwan, which was also known as "Formosa". (Taiwan was named "Formosa" by European