[2] The Gravona Valley conducts the main highway, Route N193, from the capital city, Ajaccio, to the Col de Vizzavona, where it goes through the pass and down to Corte and Bastia.

At its upper end the Gravona is a crystal-clear mountain stream cascading over falls and rapids into trout-filled pools.

The source of the river Gravona lies in the Ruisseau de Capiajola on the slopes of the 2,352 metres (7,717 ft) Monte Renoso in the center of the island.

On the other side of the col from which the Ruisseau de Capiajola flows is the source of the river Prunelli, which runs parallel to the Gravona and has the same effluent.

Gravona Canal branches from the right bank about 19 kilometres (12 mi) from Ajaccio and follows it more or less in parallel as an aqueduct, entering the city to the north.