Anio River

The Anio River (formerly called the Teverone) flows down from the mountains at Trevi in Lazio and goes westward past Subiaco, Vicovaro, and Tivoli into the Tiber River. In antiquity, most of the Roman aqueducts had their sources either from the Anio or from streams flowing into it. Today, the economy of the valley is based on tourism.