Physical Map of Tucumán
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Geographically, Tucumán presents two well differentiated regions: plains to the east and mountains to the west.

The plain area of the province is the western end of the Great Chaco, whereas the mountainous formations to the west are more heterogeneous; for instance, in the north are the sub-Andean sierras, while Pampa sierras prevail in the west. Tucumán mountain ranges are separated by bolsons and valleys.

Undoubtedly, the most important summits in the province are Calchaquíes, which adorn the Puna southern sector, and the Aconquija sierra, which includes the highest peaks, like the Nevado del Candado, 17,880 feet (5,450 m) high, and the Bolsón cerro, 18,280 feet (5,550 m) high.