The Darro is a river

River

A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

 of the province of Granada, Spain

Spain

Spain , officially the Kingdom of Spain languages]] under the European Charter for Regional or Minority Languages. In each of these, Spain's official name is as follows:;;;;;;), is a country and member state of the European Union located in southwestern Europe on the Iberian Peninsula...

. It is a tributary

Tributary

A tributary or affluent is a stream or river that flows into a main stem river or a lake. A tributary does not flow directly into a sea or ocean...

 of the Genil

Genil

The Genil River is the main tributary of the river Guadalquivir in Andalusia, Spain. The Roman Singilis, its modern name derives from the Moorish rendering of the Roman name: Sinyil, Sannil, and Sinnil. The source of the Genil is in the Sierra Nevada mountains, north of its highest peak Mulhacén....

. The river was originally named after the Roman word for gold (aurus) because people used to pan for gold on its banks. This name was then changed by the Arabs to Hadarro and after being renamed Dauro by the Christians, it finally became known as Darro.
Darro is also the name of a local town.

There are five bridges crossing the Darro: Puente del Aljibillo (Bridge of the Cistern), Puente de las Chirimias (Bridge of the Pipers), Puente de Cabrera (16th century), Puente de Espinosa (16th century). The Darro river supplied water to the Alhambra

Alhambra

The Alhambra , the complete form of which was Calat Alhambra , is a palace and fortress complex located in the Granada, Andalusia, Spain...

 through a system of aqueduct

Aqueduct

An aqueduct is a water supply or navigable channel constructed to convey water. In modern engineering, the term is used for any system of pipes, ditches, canals, tunnels, and other structures used for this purpose....

s called 'Acequia Real'.