Aburrá Valley, is the natural river basin of the Medellín River and one of the most populous valleys of Colombia in its Andean Region with near 4 million inhabitants in its biggest urban agglomeration: The Metropolitan Area of the Aburrá Valley. The valley is located on the Central Range, over the Antioquian Mountain just between the Magdalena and Cauca valleys from east to west. The name "Aburrá" comes from an ancient language spoken in the place by the "Aburreans" before the Spaniards settled the place during the 16th century.
The valley is oriented from south to north being the south the highest level and the north the low level. The altitudes of the mountains around the valley, can reach up to 3,100 m above the sea level. The lowest level is 1,300 m above the sea level. From its north natural limit to its southern part, the valley is 60 km long, while there are several varieties in its width being the wider part the one that corresponds to the municipality of Medellín with 8–10 km and the narrowest the part that corresponds to the municipality of Copacabana with 3 km.