The "Lake of Proserpina", one of two Roman reservoirs surviving near Mérida, so called because a curse addressed to Proserpina was found in it.
The Roman dam, 500 metres long, still holds back the water.
The Aqueduct "de los Milagros", carried water from Proserpina's Lake. The whole "pipeline" is 12 kilometres long, although the lake is only 5 km from Mérida. For over 800 metres, crossing a small river and before entering the city, it rose up on arches, now much favoured by storks.
The end of the other aqueduct (San Lázaro), which comes from the Cornalvo reservoir.
The channel flows into this "castellum" or distribution tower, which had filters inside.
(It is next to the houses by the Museum of Roman Art.)