The infrastructure carried water from various sources with the main reservoir located at Mazarambroz to the south of the city in the Montes de Toledo Comarca.
[2] At Mazarambroz there is a ruined Roman dam, known as Alcantarilla, on the Guajaraz, a tributary of the Tagus.
[3] A pressure drop tower, popularly known as the Horno de Vidrio, survives in the final section of the aqueduct.
From its position above the Tagus gorge, it has been suggested the Romans used an inverted siphon to bring the water into the city.
[5] The remains of the hydraulic system are partly protected by a heritage designation (Bien de Interés Cultural).